General DataComm SpectraComm 800 T3, Руководство по установке и эксплуатации

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Installation and Setup
2-4 SpectraComm 800 T3 Data Service Unit 076R160-000
Installation and Operation Manual Issue 4
Special Considerations
When the DSU is in a shelf with an SCM and S1-1 is set to OFF, the DSU operates as a master unit
and will not migrate to remote mode. If an SCM is not detected in the shelf and S1-1 is set to OFF,
the DSU operates as a remote unit.
When the DSU is in a SC 5000 shelf and S1-1 is set to ON, the DSU operates as a remote unit. The
backplane is enabled and the Craft port is directed to the DTE connector.
When the DSU is in a SC 2000 shelf and S1-1 is set to ON, the DSU operates as a remote unit. The
backplane is disabled and the Craft port is enabled.
Table 2-3 SC800 T3 Card Options (Shown in Factory Default Settings)
Location Function Option Action
X3 Selects active or backup
versions of downloaded
firmware. To force the card to run the backup firmware, set the jumper to the opposite
position to what it was the last time the card was powered up.
S1-1 Selects the operation of
the DSU as a master or
remote device. OFF (Default) Remote Only: The shelf backplane is enabled and the Craft
port is disabled
(see Special Considerations below).
ON Remote Only Disabled: Inband management supported
(see Special Considerations below)
S1-2 Sets the Frame Format
for compatibility with the
device at the other end of
the T3 line. OFF (Default) C-bit Parity
ON M13 (Inband management not supported)
S1-3 Selects Cable Length OFF (Default) Short: use this setting for 0-100 ft cables.
ON Long: use this setting for 100-450 ft cables.
S1-4 Selects Timing OFF (Default) Recovered: derives transmit T3 timing from the recovered T3
timing. Use this setting for connections to a T3 network.
ON Internal: generates transmit T3 timing from an internal
oscillator. Use this setting on one end of a back-to-back link.
1 2 3 4 5 6 7 8 ON
1
X3
S1
OFF
076P015-001
SC800 T3
800 T3
D
T
E
I
N
T
F
C
NTWK INTFC
XMT
RCV
Note: ALL S1 OPTIONS ARE SHOWN
IN THE DEFAULT (OFF) POSITION.