NTP-011: Circuit Order 363-206-285
Page 1 of 6 Issue 2, February 2000
DDM-2000 OC-3 MULTIPLEXER
Discontinue End-to-End DS1 Service
DO ITEMS BELOW IN ORDER LISTED. . . . . FOR DETAILS, GO TO
1.
!
CAUTION:
DDM-2000 circuit packs contain static sensitive components
which can be damaged by electrostatic discharge. A static
ground wrist strap must be worn when handling the circuit
packs. See electrostatic discharge considerations in
Trouble
Clearing: TAD-100
.
!
CAUTION:
When a
DS1/DS1PM
circuit pack is switched to protection,
removal of any other
DS1/DS1PM
circuit pack or
177A
Retainer Card in the same group will result in a loss of
service to the protection
DS1/DS1PM
circuit pack and the
removed
DS1/DS1PM
circuit pack.
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.
Determine which DS1 ports are to be discontinued and verify no
alarms exist on the system.
TAD-100
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