Lucent DDM-2000 OC-3 User And Service Manual page 167

363-206-285
Issue 2, February 2000
DO ITEMS BELOW IN ORDER LISTED . . . . .FOR DETAILS, GO TO
12.
NOTE:
Do not install BBF1/BBF1B DS1 or BBF3/BBF3B DS1PM
interface circuit packs in a group that is not going to be
equipped with MXRVO circuit packs.
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:
177A Retainer Cards must be installed in all empty DS1
slots in groups equipped with MXRVO and protection
DS1/DS1PM circuit packs. This is generally performed when
initial service is established. [System Turnup: NTP-004] All
LOW SPEED DS1 slots must be empty in GROUPs that are
unequipped or in GROUPs that are not equipped with
MXRVO circuit packs.
NOTE:
If BBF3/BBF3B DS1PM circuit packs are installed in service
slots, then a BBF3/BBF3B DS1PM circuit pack must be
installed in the protection slot, if protection is required.
Install service and protection BBF1/BBF1B DS1 or BBF3/BBF3B
DS1PM circuit packs (if required).
DDM-2000 OC-3 M
System Turnup:
ULTIPLEXER
NTP-016
Page 5 of 10
DLP-508