363-206-305 Circuit Order:
Issue 3, June 2000 Page 1 of 4
DDM-2000 F
IBER
R
EACH
W
IDEBAND
S
HELF
NTP-015
Discontinue End-to-End T1 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
.
NOTE:
Standard T1 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), T1 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
T1 circuit output while in an idle state. Failure to terminate T1
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 T1 circuit
that is not in service.
Determine which T1 ports are to be discontinued and verify no
alarms exist on the system.
2. Notify maintenance center that alarms will be generated while
performing this procedure.
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