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7610-A2-GK40-00
September 1997
Model 7610 SNMP DSU
Firmware Update and Errata
Document Number 7610-A2-GK40-00
September 1997
Overview
This document shows features changed with firmware releases up to
01.05.00 and corrections to the
Model 7610 SNMP DSU User’s Guide
(7610-A2-GB20-00).
Port LEDs
The description of the TXD and RXD LEDs are incorrect in the User’s Guide.
TXD – Transmitted Data:
ON – Receiving all 0s from the DTE.
OFF – Receiving all 1s from the DTE.
Blinking – User data is being transferred.
RXD – Received Data:
ON – Sending all 0s to the DTE.
OFF – Sending all 1s to the DTE.
Blinking – User data is being transferred.
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7610-A2-GK40-00
September 1997
System and Test Status Messages Clear Function
The System and Test Status information screen described on pages 6-5–6-7 has
a new virtual function key, C
lear. Select Clear and press Return to clear status
messages for one-time events such as Device Fail and Memory Fail.
Configuration Options
The default LADS Timing source has changed, affecting Table A-1 in
Appendix A.
Table A-1. System Options
LADS Timing
Possible Settings: Internal, External, Receive
Default Setting: Internal
Determines the timing source for the unit.
LADS Timing option appears when Operating Mode is set to LADS.
Internal – Timing is derived from the unit’s local clock. Use this setting for the LADS
primary timing unit that establishes the timing for both point-to-point units.
External – Timing is derived from the external clock provided by the DTE connected to
the V.35 interface on circuit CT113 (pins U, W).
NOTE: The valid rate generated by the DTE must be equal to the LADS line rate
minus the configured rate of 1600, 4000, or 8000 bps for the IMC, if
enabled.
Receive – Timing is derived from the line receive signal unless the unit is running
diagnostic tests. During the tests, the timing source is the internal clock. This setting
should be used for a LADS secondary timing unit.
*7610–A2–GK40–00*
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