Broadcast Tools STI-II Operating instructions

Brand: Broadcast Tools

Model: STI-II

Type: Operating instructions

Installation and Operation Manual

Due to the dynamic nature of product design, the information contained in this

document is subject to change without notice. Broadcast Tools, Inc., assumes no

responsibility for errors and/or omissions contained in this document. Revisions

of this information or new editions may be issued to incorporate such changes.

Broadcast Tools® is a registered trademark of Broadcast Tools, Inc.

No part of this document may be reproduced or distributed without permission.

Visit www.broadcasttools.com for important product update information.

Firmware Version 1.08

Manual Revised 07/12/2011

STI-II

Smart Telephone Interface II

INC

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STI-II Installation and Operation Manual

Table of Contents

Section Title Page #

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Who to Contact for Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Front Panel Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Rear Panel Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Installation Guidelines

Dip switch setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removal of the source termination resistors . . . . . . . . . . . . . . . . . .

Bench test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Connect your equipment to the unit . . . . . . . . . . . . . . . . . . . . . . . . .

Serial operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Remote Control wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Jumper setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Connection Suggestion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix

CONTENTS

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STI-II Installation and Operation Manual

INTRODUCTION

Thank you for your purchase of a Broadcast Tools® STI-II, Smart Telephone

Interface II (referred to as the STI II throughout this manual). We’re confident

that this product will give you many years of dependable service. This manual

is intended to give you all the information needed to install and operate the

Broadcast Tools® STI-II.

SAFETY INFORMATION

Only qualified personnel should install Broadcast Tools® products. Incorrect or

inappropriate use and/or installation could result in a hazardous condition.

WHO TO CONTACT FOR HELP

If you have any questions regarding your product or you need assistance, please con-

tact your distributor from whom you purchased this equipment.

If you would like more information about Broadcast Tools® products, you may

reach us at:

Broadcast Tools, Inc.

131 State Street

Sedro-Woolley, WA 98284-1540 USA

Voice: 360 . 854 . 9559

Fax: 866 . 783. 1742

Internet Home Page: www.broadcasttools.com

E-mail: [email protected]

THANK YOU FOR CHOOSING

BROADCAST TOOLS® BRAND PRODUCTS!

CAUTION!

Broadcast Tools®

Products, as with any

electronic device, can

fail without warning.

Do not use this product

in applications where a

life threatening condition

could result due to failure.

NOTE:

This manual should be

read thoroughly before

installation and operation.

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STI-II Installation and Operation Manual

DESCRIPTION

PRODUCT DESCRIPTION

The STI II provides a self-nulling hybrid interface between a single POTS line and

a users PC COM port. The STI II is equipped with a programmable serial port,

allowing control and monitoring via the users PC application software. This prod-

uct makes those remote call-in recording a snap while eliminating the DTMF tones.

Various LED’s, relays, pushbuttons, dipswitches and serial port comprises the user

interface to the STI II. Two modes of operation are supported; program and com-

mand.

PRODUCT FEATURES

• DSP digital delay allowing DTMF tone removal.

• Caller ID detection.

• Call progress and CPC detection.

• Electronically balanced input, output and auxiliary input.

• Microprocessor and non-volatile memory.

• Serial port interface.

• Front panel Drop and Seize switches with remote control.

• Single turn front panel level controls.

• Screw terminals for ALL connections.

• 1-RU chassis.

Front Panel

The STI-II is a 1-rack unit device (19”w x 1.75”h x 4.5”d). The front panel supports

five selection switches, 10 LED indicators, Telco send and receive level controls and

auxiliary input level control.

Rear Panel

Installation is simplified with screw terminal connectors. The STI-II may be pre-

wired and installed in minutes. The rear panel consists of one 9-pin D-Sub RS-232

connector, two-telephone line modular connectors, 2.1mm coaxial power connector

and screw connectors.

Front panel switches

Function Function Description.

“RST” Resets the microprocessor.

“PGM” Puts the system into programming mode.

“DROP” Disconnects the unit from the telephone line.

“SEIZE” Connects the unit to the telephone line.

“ENABLE” When enabled, this switch must be pressed and held to have

other switches operate.

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Front panel LED indicators

Function Function Description

“PGM” Illuminated when in program mode.

“TX-ACT” Illuminated when audio to telephone line is at optimum level.

“RX-ACT” Illuminated when audio from the telephone line is at optimum

level.

“TX-DATA” Illuminated when transmitting serial data.

“RX-DATA” Illuminated when receiving serial data.

“ACCESS” This LED illuminates when the correct access code is accepted.

“TONE” Illuminate each time a valid DTMF tone is decoded.

“HOOK” Lights when the STI-II picks up a call.

“RING” Indicator will flash each time a ring signal is received.

“PWR” Valid power indicator.

Audio Inputs

Each of the 2 monaural inputs are balanced bridging (20KW) at a nominal line level

of +4dBu. Single turn level controls are provided for each input.

Audio Outputs

Provides a single balanced monaural output. The output is set at +4dBu

@ 100 W and may be adjusted from off to + 4 dBu. Note: With –9dbm at the

receive end of the telephone line.

Relay Outputs

The STI-II contains 5 spst relays. Each relay corresponds to the front panel led indi-

cators.

User Programming

The STI-II programming is stored in non-volatile memory. Configurations are pro-

grammed with selection dipswitches and computer commands.

SERIAL PORT CONFIGURATION The serial port Baud Rate, Data Bits, and

Parity are set up from the settings on Dip Switches 1-6 and the three jumpers at JP-4.

(See Figure 1.) These settings apply to both Program and Command modes.

PROGRAM MODE Is Entered by pressing the hidden PROGRAM push-button. Is

exited by generating a Hardware Reset. When in programming mode; the Phone

Line is placed On-Hook; the Rear-Panel-Busy input is ignored; the SIEZE and

DROP push buttons are ignored; Caller-ID and Call Progress signals are ignored. In

programming mode, a connection to the Hyper Terminal PC program with local

character echoing enabled (or equivalent functionality) is assumed.

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COMMAND MODE The STI-II defaults to command mode from power up. When

first entering command mode, all parameters are set to their User Default values.

PARAMETERS Three sets of parameters are: Factory (Firmware) Default; User

Default; and Current Value. All parameters may be viewed and setup from Program

Mode. Program Mode commands provide for restoring all parameters to Factory

(Firmware) Default values, and changing individual parameters. The values select-

ed at the time of exiting program mode are saved as the User Default values. User

Default parameters may be setup/changed from command mode using the appropri-

ate command(s) (See Commands section).

Because we cannot retain all session context across a reset event (relays will glitch

18ms minimum, for instance), we identify a subset of the parameters which main-

tain a Current Value, which may be different from the User Default value. For the

other parameters, the current value IS the user default value. Since the STI-II is

reloaded with user default values at reset time, the board returns to a “known good”

safe application context when a reset occurs. Typically the parameters with a current

value separate from the user default value are “session context” parameters that may

change during the normal computer/STI-II interaction, and the others are “environ-

ment context” parameters that (typically) are set up once and not changed after-

wards. Details about the parameters are found in the Command Table section.

Commands with possible R/W/S prefixes are Session Context parameters.

Commands with possible R/S prefixes are Environment Context parameters.

COMMANDS Command and response bytes never use the most significant bit,

thus supporting 7-bit data RS-232 formats. (Data sent from the STI-II to automation

equipment in response to DTMF macros may be 8-bit data). All commands sent to

the STI-II begin with the ASCII ampersand character ‘&’ (0x26) as a lead-in. One

of four command-type letters is expected immediately after the caret. (Lower case is

forced to upper case before being evaluated, so it is permitted.) The letters are (from

the point of view of the PC control program):

R for read; W for write; S for write and then Set the default value; and C for com-

mand. The command-type letter is immediately followed by 3 ASCII decimal dig-

its, which comprise the command number. One ASCII blank is sent immediately

after the command number.

After the command [and parameter] bytes are sent, the PC control program should

wait for the response: If the command is successful and isn’t required to respond

with data bytes, a single ASCII ‘@’ will be sent as an ACK character. If it fails, a

single ASCII ‘~’ character will be sent as a NAK character. If the command requires

a response but fails, the single ASCII ‘~’ NAK character will be sent. If the com-

mand requires a response and is able to send it, its form will be: An ASCII ‘%’ lead-

in character followed by the required data items. Following the %-initiated response

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record, the STI- II program will send one of the following sets of additional charac-

ters based on the value of the Response Format command: <no more characters>;

A time limit of 5 seconds is enforced when command characters are expected. If the

gap between characters becomes 5 seconds, the command is aborted, and a NAK

character is transmitted. Extra characters received when performing EPROM oper-

ations are ignored;

but in other cases, extra characters (received while performing a command) may

cause the command to be aborted and a NAK to be sent. While sending multiple

single or DTMF tones (C110, C120 commands), this trait may be used to intention-

ally terminate the command before all tones and wait periods are completed.

The programmer should Note that the single ASCII blank after the command num-

ber and before any command parameters is required before the command will be

recognized and executed.

The following table of commands shows the permissible command-type letters, the

command number, the command description, and the

command parameters.

STI-II Command Table

C 000 Synchronize Available for confirming communications synchroniza-

tion PC to STI-II. When received by STI-II, a single ‘@’ ACK character is returned. This

may be used to confirm the presence of an STI-II board at the end of the PC’s serial port

cable, and that both sides of the com link agree on Baud Rate, number of data bits, and

parity. Also, if communication is disturbed, broken commands may occur. In this case

the PC will not receive ACKs, NAKs, or %<response records> as expected. The

Synchronize command may be issued until recognized resulting in the expected ACK

response. (When the STI-II detects a broken command condition, it ignores all received

characters until a new ‘&’ lead-in character is detected.)

C 010 Report Version Response is: %STI-II Version 1.00

C 020 Reset Factory Defaults Response is ACK or NAK See Read/Set

All Parameters for parameters affected. Also sets Macro Data to Factory Default values.

C 022 Restore EPROM Defaults Response is ACK or NAK. Reads all

parameters out of EPROM and applies setting to program.

C 030 Read All Parameters Response bytes are:

[Selected Response Format bytes], then the response lead-in character (%), then 1 contin-

uous block of parameter bytes in order from the parameter list below. No blanks, no com-

mas. Then 1 ASCII hex checksum character (ASCII hex character for sum of ASCII data

characters modulo 16). Then the [selected Response Format bytes].

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Parameter list:

200 Access Security Code

210 Audio Paths Control

212 Report Hardware Reset

214 Ring Event Reporting

220 Auto Answer Ring Number

222 Report Auto Answer Event

224 Rear Panel Busy Reporting

230 Calling Party Control

234 LongDialTone Control

240 Caller ID Reporting

250 Call Progress Reporting

260 No Loop Current

270 Manual Seize

280 Manual Drop

290 Valid Access Code

300 Response Format

310 DTMF Transmit Speed

320 DTMF Delay Time

; Macro Data NOT included in this list.

C 040 Set All Parameters C040<blank> followed by:

1 continuous block of parameter characters from the list of parameters below with

no blanks or commas. Then 1 ASCII hex checksum character calculated thus: (Sum

of all parameter bytes ASCII values) modulo 16.

Parameter list:

200 Access Security Code

210 Audio Paths Control

212 Report Hardware Reset

214 Ring Event Reporting

220 Auto Answer Ring Number

222 Report Auto Answer Event

224 Rear Panel Busy Reporting

230 Calling Party Control

234 LongDialTone Control

240 Caller ID Reporting

250 Call Progress Reporting

260 No Loop Current

270 Manual Sieze

280 Manual Drop

290 Valid Access Code

300 Response Format

310 DTMF Transmit Speed

320 DTMF Delay Time

; Macro Data NOT included in this list.

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C 050 Read Current States C050<blank> response is: Response

LeadIn, <single ASCII character for each of thirteen conditions: Y=yes; N=no.>

1) Rear-Panel Busy

2) Phone Off Hook

3) Ring Present

4) Seize Button Down (Debounced key state)

5) Drop Button Down (Debounced key state)

6) Dial Tone Present

7) Busy Signal Present

8) RingBack Signal Present

9) ReOrder Signal Present

10) Audio RX Active

11) Audio TX Active

12) Valid Access Code

13) DTMFTonePresent

Example: For Idle On-hook, not busy: %NNNNNNNNNNN

then ring occurs: %NNYNNNNNNYN

after Sieze command %NYNNNNNNNNN etc.

C 060 Read Latched Events Read flags for events which

meet all these conditions: a) event has occurred; b) event has not been reported; and

c) event has not yet been reported by polling (previous call to this command). Events

reported in this command response are then automatically cleared. Events which are

automatically reported (according to parameter settings) are NOT reported here.

Bytes sent: C060<blank> Response is: Response LeadIn, <single ASCII character

for each of seventeen conditions: Y=yes; N=no:>

0) STI-II Hardware Reset Event

1) Ring Event

2) CID Event (Read CID with Read Last CID command)

3) Manual Seize Event (off hook)

4) Auto Answer Event

5) Manual Drop Event (on hook)

6) No Loop Current Event (no loop current when going off-hook [checked

after 500ms])

7) CPC Event (loss of loop current after we were off-hook

[checked after 150-200ms])

8) Long Dial Tone Event (500 ms dial tone may lead to hang-up)

9) Dial Tone Event (Dial Tone first detected)

10) Busy Event (Busy Signal first detected)

11) Ring Back Event (Flag set for each Ring Back after qualifying)

12) ReOrder Event (ReOrder Signal first detected)

13) DTMFdigitRX (Flag always set when DTMF digit received, regardless of

whether Access Security is set up or (fully) entered. Read it with Read Last

DTMF command.

14) ValidAccessCode Event

15) STI-II_Busy_On Event

16) STI-II_Busy_Off Event

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DESCRIPTION

Format for Automatically Reporting Latched Events:

When a Latched Event Automatic Report is enabled, the occurrence

is communicated by sending a record to the PC in this format: &E<dd> < Response

Format Characters (if any)> (where dd is a two digit ASCII decimal number 01-16

identifying the Event).

C 070 Seize Off-Hook Take phone line off hook.

C 080 Drop On-Hook Place phone line on hook.

C 090 Read Last CID Record Read In data for date, time, phone

number (and name?) for last received CID record. Response is: %<binary CID

record type><binary CID data byte count><CID data bytes><CID cksum char>. If

no CID record has been received since the last reset, the command returns %N only.

When auto-reporting, lead-in is ^ char instead of %.

C 100 Read Last DTMF digit Read in last received DTMF

digit. Works both pre and after Access Code received (or bypassed). DTMF after

Access Code can be detected by receiving DTMF digit Macro serial port Data.

DTMF before and after Access Code can be detected using this command after see-

ing DTMFdigitRX flag set in C060 Read Latched Event command response.

Format is: <ASCII lead-in><ASCII DTMF char>. Example: %3 for touch-tone 3.

Note: After reset, C100 command will report the ‘D’ DTMF digit.

C 110 Transmit Single Tone(s) Parameters following provide for

sending 1 to 9 1-of-8 tones and/or wait periods with durations of 100ms to 1000ms.

Parameter bytes are (all single ASCII decimal digit values): <Count> <Tone

Number> <Duration Number> [ … <Tone Number> <Duration Number> ]

Duration Number 1 ‡ 100ms; 2 ‡ 200ms; … ; 9 ‡ 900ms; 0 ‡ 1second. ACK is sent

after tones and wait periods have all timed out.

Tone Number Table

Number Row/Col# Frequency

0 Neither wait period

1 R1 697

2 R2 770

3 R3 852

4 R4 941

5 C1 1209

6 C2 1336

7 C3 1477

8 C4 1633

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C 120 Transmit DTMF Tone(s) Send from one to 30 DTMF

digits at selected transmission speed. ACK sent after last DTMF digit is sent and

wait period timed out. Parameter bytes (all ASCII) <decimal count high> <decimal

count low> <1 or more DTMF chars>

R/W/S 200 Access Security Code

From 0 (not-used) up to 8 DTMF digits required for remote called/calling person to

enter to obtain access to DTMF command macros. Parameter data is fixed-length =

8 bytes. Valid DTMF digits from the set {123456789*0#ABCD} are used to build

the (valid) access security code. Unused character locations are represented by pad

characters such as ‘-‘ or other non-DTMF characters. The first non-valid DTMF

character terminates the interpretation of the Access Security Code, even if other

valid DTMF characters are found thereafter: For instance: 1234-5%- decodes a secu-

rity access code of “1234”, NOT “12345”. Note: If Off-Hook, the new access code

is applied immediately; If no DTMF characters in the new code, we will have access

immediately; if 1-or-more DTMF characters in the new code, we will lose access

immediately.

Factory Default Values: --------

R/W/S 210 Audio Paths Control

Parameters are: Auxiliary Audio Input: Y/N

Audio Path Delay: Y=Delay/N=Direct/O=Off

Telco Send: Y/N

Example: Aux Off; Delay; Telco Send Off: = NYN

Factory Default Values: NYY

R/W/S 212 Report Hardware Reset

Report Reset Y/N

Factory Default Values: Y

R/W/S 214 Ring Event Reporting

Report Ring Y/N

Factory Default Values: Y

R/W/S 220 Auto Answer Ring

Parameter field has exactly two ASCII decimal Digits:

00=Do Not Auto Answer; 01-15 = answer after # rings.

Factory Default Values: 02

R/W/S 222 Report Auto Answer Event

Report AutoAnswer Y/N

Factory Default Values: Y

R/W/S 224 Rear Panel Busy Reporting

Report Going Busy Y/N

Report Going Not-Busy Y/N

Factory Default Values: YY

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R/W/S 230 Calling Party Control (CPC)

Hang Up Y/N

Report Y/N Example: Hang Up and Report: YY

Factory Default Values: YY

R/W/S 234 LongDialTone Control (LDT)

Hang Up Y/N

Report Y/N Example: Hang Up and Report: YY

Factory Default Values: NY

R/W/S 240 Caller ID Reporting

Report CID Data Automatically? Y/N

Factory Default Values: Y

R/W/S 250 Call Progress Reporting

Dial Tone Y/N

Busy Signal Y/N

RingBack Signal Y/N

ReOrder Signal Y/N

Examples: Report All YYYY

Report Dial & Busy only YYNN

Factory Default Values: YYYY

R/W/S 260 No Loop Current

When first going off-hook, expected loop current not found.

Hang Up Y/N

Report Y/N Example: Hang Up NO; Report Yes: NY

Factory Default Values: YY

R/W/S 270 Manual (push button) Sieze

When not in Programming Mode, phone line is taken off hook.

Report Y/N

Factory Default Values: Y

R/W/S 280 Manual (push button) Drop

When not in Programming Mode, phone line is placed on hook.

Report Y/N Factory Default Values: Y

R/W/S 290 Valid Access Code

Automatically report it, or [find] it in ReadLatchedEvents response

Report Y/N Factory Default Values: Y

R/S 300 Response Format

The command provides control over formatting of the command and response dis-

play on the Control PC’s display screen. The parameter determines which extra char-

acters to include before multi-line responses, and after single lines of response data.

Extra Chars: N=<none>; B=<one blank>; C=<CR>; L=<CR><LF>

Factory Default Values: L

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R/S 310 DTMF Transmit Speed

Transmitted DTMF on and off time:

Normal=100ms / Fast=50ms N/F

Factory Default Values: N

R/S 320 DTMF Delay Time

One setting is used to coordinate firmware with STI-II jumpers for both received

DTMF guard time, and delay time. Options are: Slow=~60ms; Medium=~90ms;

and Fast=~150ms: S/M/F

Factory Default Values: M

R/S 330 Macro Parameter Entry

Read/Set ONE DTMF Macro; parameters are DTMF digit from the set

{1234567890*#ABCD}, and a block of exactly 64 ASCII hex bytes representing 32,

8-bit binary bytes which comprise the Table Entry’s macro data. Unused trailing

macro bytes are padded with nulls (represented by two ASCII zeros ‘00’).

When the R330 command is invoked, the return parameter record is followed by the

Response Format command characters.

The factory default values reflect the fact that the data sent in response to a DTMF

(command) digit from the remote phone persion (after entering the Access Security

code if any), is sent out as is in binary form (after trimming all trailing nulls). AND

THEN IS FOLLOWED BY the Response Format characters (if any).

Factory Default Values:

1 = &1 5 = &5 9 = &9 A = &A

2 = &2 6 = &6 * = &* B = &B

3 = &3 7 = &7 0 = &0 C = &C

4 = &4 8 = &8 # = &# D = &D

AUTOMATICALLY REPORTED EVENTS

E00 Hardware Reset.

E01 Ring Event.

E02 <Telco supplied data> Caller ID.

E03 Manual SIEZE command.

E04 Auto Answer Event.

E05 Manual DROP command.

E06 No Loop Current NLC Event.

E07 Calling Party Control CPC Event.

E08 Long Dial Tone LDT Event.

E09 Dial Tone Event.

E10 Busy Event. (Busy signal first detected).

E11 Audible RingBack Event. (Event generated for each ring).

E12 ReOrder Event. (ReOrder signal first detected).

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Use C060 to Read Latched Events. 13th byte = Y when new DTMF

character is received. Use C100 to read in the DTMF digit (whether

or not the Access Code is entered). If Access Code is entered,

successive DTMF characters will cause DTMF macro characters to

be sent.

E14 Valid Access Code Event

E15 STI RearPanel Busy ‡ Active = Busy

E16 STI RearPanel Busy ‡ InActive = Not Busy

External EEProm

The 24LC256 8-pin DIP external I2C EEProm chip is located just under the main

(microprocessor) chip on the STI-II printed circuit board.

When the STI-II first starts running, it ‘looks’ for this chip, and reads its contents. If

the chip is missing, or formatted incorrectly, the program signals the user by repeat-

edly displaying a Morse Code character on the Program Mode LED. If the chip is

not found, a Long-Short (dah-dit), or ‘N’ is shown, signifying No EEProm. If the

chip is present but is not formatted correctly, a Short-Short (di-dit), or ‘I’ is repeat-

edly displayed signifying Invalid. If the EEProm is present and correctly formatted,

a Short-Short-Short-Long (di-di-di-dah), or ‘V’ is shown ONCE, signifying a Valid

EEProm and contents.

If the chip is missing, a chip must be supplied.

The DROP and SIEZE pushbutton combination will cause the factory default

parameter values to be written into the EEProm, and cause the program to continue

normal operation. This operation is NOT done automatically so that the operator

may be alerted to the problem, and so that potentially valuable configuration data

will not be overridden.

Note: The DROP and SIEZE button combination does NOT write the factory default

macro texts into the EEProm. If these are desired, they may be set using Program

Mode, by invoking the C020 Reset Factory Defaults command, or by invoking the

S330 command to explicitly write each macro.

EEProm Format

The first 8 EEProm bytes are the name and version field.

Its contents are: STI2V100

If the first three characters are: STI then the EEProm will pass

the test for valid formatting.

The following 35 bytes are exactly equal to the bytes in the parameter list of com-

mand C040 (not including the checksum character).

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The Macro Data are stored in these locations:

DTMF ADDRESSES DTMF ADDRESSES

D 100-11F 8 200-21F

1 120-13F 9 220-23F

2 140-15F 0 240-25F

3 160-17F * 260-27F

4 180-19F # 280-29F

5 1A0-1BF A 2A0-2BF

6 1C0-1EF B 2C0-2EF

7 1E0-1FF C 2E0-2FF

EXAMPLES of Possible Usage

These ‘script fragments’ are intended to give a beginning idea of how the STI-II com-

mands may be used to manage the computer/phone-line interface. In an actual appli-

cation, extra care must be taken to manage all possible conditions, which may arise,

including unexpected hang-ups, communications errors, nutty user behavior, etc.

The PC program for controlling the STI-II may be Polling driven or Event driven,

or both. Event driven code can be more convenient, but polling driven code offers

additional capabilities, and can be a fall-back technique to confirm what is happen-

ing with the event traffic when reliability is of utmost concern, or when the applica-

tion needs to verify what the current conditions are. Both techniques may be inter-

mixed.

The program should pay attention to the lead-in character for messages received

from the STI-II. The caret ‘^’ lead-in indicates a message Autonomously generated

by the STI-II – either a DTMF macro, or an Automatic Event Report, such as ^E01

(ring event). The percent ‘%’ lead-in indicates a response to a host program initiat-

ed command, such as: &R210<blank> resulting in: %NYY which reports the cur-

rent settings for the Audio Path Controls. The ‘@’ ACK character and ‘~’ NAK char-

acter are also the result of host program initiated commands or fragments from bro-

ken host commands.

Polling Design

The C050 Read Current States and C060 Read Latched Events commands make it

possible to design a control program that minimizes or eliminates message traffic

initiated by the STI-II. In this environment the host computer drives the interaction

with the STI-II.

&C040 <Access Code>NYYNN00NNNYNYNNNNNNYNNNNLNM<cksum>

This example would turn off ALL automatic reporting, while keeping the automatic

hang-up enabled for Calling Party Control, No Loop Current, and Long Dial Tone

conditions. The C050 and C060 commands would be used repeatedly from the con-

trol computer to drive the interaction.

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By clearing the default macros, ALL STI-II-initiated message traffic may be sup-

pressed. For example:

&S330 *00000000000000000000000000000000

00000000000000000000000000000000

along with

&S300 N (to turn off extra response formatting characters)

will block any AUTOMATIC reporting resulting from a * DTMF digit even when

Valid Access Code has been achieved.

The reception of DTMF may still be detected by C060’s thirteenth byte value, and

then read with C100:

&C060 %NNNNNNNNNNNNNYNNN (DTMF char)

This you may choose to ignore because 15th flag = N = user hasn’t

yet fully entered his access code.

Later with

&C060 %NNNNNNNNNNNNNYYNN (DTMF char, Valid Access Code)

You could go on and read the DTMF character

&C100 %* (Last DTMF was *)

NOTE: It is important to make all desired use of ANY and ALL event flags in the

C060 response before performing another C060 command. Any flag that reads

active (‘Y’) will read inactive (‘N’) next time unless a NEW event occurrence takes

place to re-activate the flag.

By contrast, the C050 response tells the current state for each item reported, and may

be read continually to stay up with what’s happening:

&C050 %NNNNNNNNNNNNN On Hook, Idle

…

&C050 %NNYNNNNNNNNNN 1st Ring Detected

…

&C050 %NNNNNNNNNNNNN 1st Ring Ends

…

&C050 %NNYNNNNNNNNNN 2nd Ring Detected

…

&C050 %NNNNNNNNNNNNN 2nd Ring Ends

…

&C050 %NYNNNNNNNNNYN Off Hook & Valid Access Code

(must have auto answered and not had any Access Code)

let’s check

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&C060 %YYYNYNNNNNNNNNYNN -- sure enough, events reported are:

Hardware Reset (no C060 command since reset), Ring Event (actually two, but latch

remained on showing at least one), CID Event, Auto Answer Event, Valid Access

Code Event.

All these event flags are cleared after reading.

&C060 %NNNNNNNNNNNNNNNNN

Now here comes a DTMF digit

&C060 % NNNNNNNNNNNNNYNNN

We read to see which DTMF it is

&C100 %*

We may also time its duration

&C050 % NYNNNNNNNNNYY

start your timer here

&C050 % NYNNNNNNNNNYY still going

&C050 % NYNNNNNNNNNYN AND STOP.

Event Driven Design

After invoking the Reset Factory Defaults command:

&C020 @

and receiving the ACK, the parameters values are set to send EVERY event notifi-

cation that the STI-II supports. After adjusting parameters as appropriate, the appli-

cation design is then mostly waiting for event notifications and responding to them.

Sound design would suggest using the C050 or C060 commands from time to time

to confirm that the conditions are as your program thinks they are.

A possible stream of event announcements, and responses might be:

(with time possibly elapsing between entries)

Incoming Call

<reset>

^E00 hardware reset

^E01 ring event

^E02 <telco caller id data>

^E01 2nd ring

^E04 Auto Answer event

^E14 user has entered Valid Access Code

&C080 @ drop the call

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Outgoing Call

<reset>

^E00 hardware reset

&C070 @ SIEZE = take phone off hook

[busy phone]

^E10 busy signal

&C080 @ DROP line, timeout and retry

[No phone]

^E06 No Loop Current

&C080 @ DROP line, send-up a flare, sound the alarm …

[phone ok]

^E09 dial tone

&C120 1115415551234 ﬂ wait for 11*100ms if fast transmission

speed, or 11*200ms if normal (100ms on, then 100ms off for each DTMF tone).

@ ﬂ in its own sweet time.

^E11 Audible RingBack Event – 1 ringy-dingy

^E11 2nd ring

<So… ‘How do we know if they answered?’ your asking, right?

Well, I think we look for problems, and look for signs of Life:

a) Problems: ^E07 CPC (hang-up);

^E12 ReOrder (trunk busy, we should hang up);

other unexpected stuff

b) Signs of Life: i) wait for ^E14 -- user has entered access code;

ii) &C060 response tells if DTMF being entered

to achieve Valid Access Code.

^E07 CPC user hang up

^E08 LDT user hang up

&C080 @ we DROP the call

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STI-II Hardware JUMPERS

J1: jumper info

J2: Guard Time: 1-2 = 2-3 =

J3: Audio Delay Time: 1-of-3 jumpers should be installed: Top=150ms;

Middle=90ms; Bottom=60ms.

J4: Normal/300_Baud: Three jumpers jumpered 1-2 = 300Baud setting;

jumpered 2-3 = Normal Setting. Dip Switches 4,5, and 6 must be ON for 300 Baud;

must NOT all be on for Normal setting.

STI-II Dip Switch Settings

Herein: 1 = Switch is ON or CLOSED;

0 = Switch is OFF or OPEN.

Switch 1:

Determines number of data bits: 1=7 data bits; 0=8 data bits.

Switch 2:

Selects even parity: 1=Even Parity; 0=No Parity, or Odd Parity.

Switch 3:

Selects odd parity: 1=Odd Parity; 0=not odd.

Switch 4:

Selects Baud Rate Range: 1=Slow Baud Rates; 0=Normal Baud Rates.

Switch 5:

Baud Rate High

Switch 6:

Baud Rate Low

Switches Result Switches Result

123 456

---------------------------------- --------------------------------------------

0008-N-1 0 0 0 9600

0018-O-1 0 0 1 19.2K

0108-E-1 01038.4K

0118-E-1 01138.4K

1007-O-1 1 0 0 1200

1017-O-1 1 0 1 2400

1107-E-1 1104800

1117-E-1 111300 (set J4)

Even Parity: Requires total number of ‘1’ bits in data and parity bits to be even.

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SPECIFICATIONS

Input Levels: Adjustable, Max + 24dbu, balanced bridging

(Send to telephone line and (Aux to DTMF receiver).

Output Levels: Adjustable, Off to + 4 dbu, @ 100 W, balanced out-

put (Receive audio from telephone line).

Logic: Microprocessor, EEprom user programming memory

and high performance DTMF transceiver.

Relays: Sealed relays, utilizing form A contacts. Contacts

30 vdc @ 500 ma.

NOTE: For safety, do NOT connect 120 Volt circuits to the

relays.

Busy: Compatible with 5 volt CMOS/TTL, open collector

or contact closures. Max logic voltage 5 vdc.

Connectors: I/O - Screw terminals.

Phone - Modular, RJ-11C phone line, cable supplied.

Serial - Female DB-9, D-Sub, cable supplied

Ringer equivalence: 0.2A (AC) / 3.0 (DC).

Power Requirements: 16 Vac, @ 600 ma. 120 Vac wall transformer.

Supplied

Size: 19" X 1.75" X 4.50" (WHD)

Weight: 3.0 lb.

Shipping weight: 4.0 lb.

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