Lucent DDM-2000 OC-3 User And Service Manual page 114

NTP-006
: Circuit Order
Page 2 of 6
DO ITEMS BELOW IN ORDER LISTED. . . . . FOR DETAILS, GO TO
NOTE:
Standard DS1 transmitter sources are designed to terminate
in a nominal 100-ohm impedance. This termination is usually
provided by the receiving equipment. When not connected to
receiving equipment (that is, idle or unterminated), DS1
transmitter equipment should terminate in a 100-ohm load.
When connecting through DSX equipment, this can be
accomplished with terminating plugs available from the DSX
manufacturer. Any alternative method may be used resulting
in 100-ohms across the TIP and RING of the DS1 circuit
output while in an idle state. Failure to terminate DS1 outputs
may result in violation of FCC Part 15 emission requirements
and possibly interfere with other electronic equipment. Also,
AIS should be turned off (using the
set-t1:address:ais=no command) on any DS1 circuit
that is not in service.
NOTE:
If the DDM-2000 fails to respond in the indicated manner,
refer to Trouble Clearing: IXL-001.
Determine which DS1 ports/slots are to be put into service and
what options are to be selected.
2. Verify that no LEDs or alarms are activated. If any LEDs or alarms
are activated, refer to Trouble Clearing: IXL-001 and follow the
appropriate trouble-clearing procedure.
DDM-2000 OC-3 M
Issue 2, February 2000
ULTIPLEXER
363-206-285