Avaya S8700 Maintenance Manual page 166

Alarms, Errors, and Troubleshooting
TN771D in Stand-Alone Mode
In TN771D stand-alone mode, a terminal is connected to the Maintenance/Test
circuit pack with an Amphenol connector behind the cabinet. This setup allows
direct inspection of the packet bus and identifies shorted or open leads. This
mode does not use the usual MT Maintenance User Interface and is therefore
available even if switch is not in service. When in stand-alone mode, the TN771D
does not reconfigure the packet bus.
Required Hardware
TN771D: Duplex-, or high-reliability systems may not have a TN771D in
each EPN. (Use list configuration to determine whether this is so.)
When this is the case, take one to the site. See the following section,
''Special Precaution Concerning the TN771D'' on page
Terminal or PC with terminal-emulation software: The EIA-232 (RS-232)
port should be configured at 1200 bps with no parity, 8 data bits, and 1 stop
bit. This is a different configuration than the G3-MT. If a terminal
configured as a G3-MT is used, change the SPEED field from 9600 bps to
1200 bps on the terminal's options setup menu. (This menu is accessed
on most terminals by pressing the CTRL and F1 keys together. On the 513
BCT, press SHIFT/F5 followed by TERMINAL SET UP.) Remember to
restore the original settings before returning the G3-MT to service.
355A EIA-232 adapter (Comcode 105 012 637).
258B 6-port male Amphenol adapter (Comcode 103 923 025). A 258A
adapter and an extension cable can also be used.
D8W 8-wire modular cable with an appropriate length to connect the 258A
behind the cabinet to the 355A adapter. The relevant comcode is
determined by the cable's length, as follows:
Selecting a Slot for Stand-Alone Mode
When selecting a slot to use for a TN771D in stand-alone mode in an EPN that
does not already contain one, keep the following points in mind:
A port circuit slot (indicated by a purple label) should be used. The service
slot (slot 0) cannot be used for stand-alone mode, even though a TN771D
may normally be installed there.
-5 Volt power supply must be available in the carrier. (For a description of
carrier's power supply units, refer to
on page
A slot in an EPN's A carrier is preferable if the previous conditions are met.
4-92 Issue 1 May 2002
7 feet (2.1 m) — 103 786 786
14 feet (4.3 m) — 103 786 802
25 feet (7.6 m) — 103 786 828
50 feet (15.2 m) — 103 866 109
8-393.)
4-98.
''CARR-POW (Carrier Power Supply)''
555-233-143