Lucent Technologies DDM-2000 OC-3, Руководство по установке

Страница: 205 / 492

363-206-204
Powering, Verification, and Circuit Pack Installation
Issue 9 October 1998 4-11
■
DS1 line code (AMI or B8ZS)
■
Frame format (superframe or extended superframe)
■
Timing format (external, free running, loop-timed or sync out mode).
■
Equalizer Setting (0-655ft).
1. Set the BBF2B circuit pack option switches per office timing source and
required equalization as shown in Figure 4-14.
2. Place, but do not fully install, the BBF2B circuit pack(s) into the shelf.
BBF8 (HDSL) Circuit Pack
The BBF8 circuit pack has one option switch for assigning the following:
■
HDSL start-up (master or slave)
■
HDSL management (local or through)
1. Set the option switch for operation as planned as shown in Figure 15.
2. Place, but do not fully install, the BBF8 circuit packs into the shelf.
NOTE
:
Only three BBF8 circuit packs can be used in a function group. See 363-
206-285
DDM-2000 OC-3 Multiplexer User/Service Manual for more
details on use of this circuit pack.
Optical Line Interface Units
!
CAUTION:
For all OLIUs, if a single mode fiber is used, any LBO, other than 0 dB, must
be placed in the transmit (OUT) connector of the circuit pack. For multimode
fibers, such an LBO must be on the receive (IN) connector.
21G (OLIU) Regenerator
The 21G OLIU circuit pack (Releases 6 and 8) has one option switch for assigning
the output power.
1. Set the 21G OLIU circuit pack option switch for low-output power per Figure
4-16.
2. Place, but do not fully install, the 21G circuit pack(s) into the shelf.