Issue 5 November 2000
363-206-208
Powering, Verification, and Circuit Pack Installation for the DDM-2000 OC-12 Multiplexer
Lucent Technologies - Proprietary
See Notice on first page
Notes:
1. If the shelf is located in a CO and the DDM-2000 OC-12 IS NOT connected to a DS1 clock (J66
on backplane), set the Timing Mode for "Free Running".
2. If the shelf is located in a CO and the DDM-2000 OC-12 IS connected to a DS1 clock (J66 on
backplane) and the DS1 output (Sync Out) will not be derived from the received OC-12 line for net-
work timing distribution, set the Timing Mode for "DS1 External, MULT OUT Mode".
3. If the shelf is located in an RT and DS1 output (Sync Out) will not be derived from the received
OC-12 line for network timing distributions, set the Timing Mode for “line-timed”.
4. If the shelf is located in an RT and DS1 output (Sync Out) is to be derived from the received
OC-12 line for network timing distribution, set the Timing Mode for “line-timed, SYNC OUT Mode”.
5. If the shelf is located in a CO and the DDM-2000 OC-12 IS connected to a DS1 clock (J66 on
backplane) and DS1 output (Sync Out) is to be derived from the received OC-12 line for network
timing distribution, set the Timing Mode for "DS1 External, SYNC OUT Mode".
6. The pulse format (AMI or B8ZS) and frame format (superframe or extended superframe) are set
for the attributes of the external clock if “External” timing is selected. In the absence of DS1 clock
information set DS1 Line Code for AMI and Frame Format for Superframe.
Notes:
1. Equalization is set according to the length of the DS1 External timing cable, running from J65 of
the DDM-2000 OC-12 shelf to the timing reference when the BBF2B/BBF4 TGS is set for SYNC
OUT mode.
2. Distance in feet for 22-gauge PIC (ABAM) cable.
Figure 5-8 (Continued). BBF2B/BBF4 TGS Option Switches for OC-12 Multiplexer (Sheet 2 of 2)
Switch 2 Settings
Equalization (Notes) Sec 1 Sec 2 Sec 3 (DS1 Output)
0’ to 131’ ON ON OFF
>131’ to 262’ ON OFF ON
>262’ to 393’ ON OFF OFF
>393’ to 524’ OFF ON ON
>524’ to 655’ OFF ON OFF
(Invalid) OFF OFF OFF
(Invalid) OFF OFF ON
(Invalid) ONONON
To Next Page
Loading...
Need help?
General
