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•
Install an ATM card, add the card to the system database, and enable it for the
HS Source Timing feature (ent‑slk:atmtsel=external); or
•
Install an E1/T1MIM, add the card to the system database, and enable it for the
HS Source Timing feature (ent‑e1:e1tsel=external).
Reconfigure any existing ATMLIM card or E1/T1MIM to use the HS Source Timing
feature. LIM cards that will continue using the composite clock will not require any
changes to the card provisioning.
Note:
The EAGLE terminal output screens refer to the composite clocks as
Building Integrated Timing Source (BITS) clocks. In this document,
references to BITS and composite clocks are interchangeable.
Source Timing Site Requirements
Implementation of the HS Source Timing feature requires the following software and
hardware baselines:
•
One of the following Control Card/Software Release sets:
–
E5-based Control Cards with Software Release 40.1 or later
Note:
See "Hardware Baseline Table" in Release Notes for compatible card
and control shelf and extension backplane part numbers.
•
Control shelves with backplane (P/N 850‑0330‑03 or 04), if adapter cables P/
N 830‑1183‑01 are installed with HS clock cables P/N 830‑0873‑xx or P/
N 830‑1189‑xx.
Note:
Replace the existing composite clock cables (P/N 830‑0226‑xx) with
RS422 compatible HS Source and composite clock cables P/
N 830‑0873‑xx or P/N 830‑1189‑xx. For control shelves with backplane
(P/N 850‑0330‑06 or ‑07 or later), connect the cables to J48 and J49
(primary and secondary BITS) and connect the other ends to the site
clock sources.
Note:
For control shelves with backplane (P/N 850‑0330‑03 or 04), connect the
adapter cables (P/N 830‑1183‑01) between connectors J57 and J56
(ACLK3 and ACLK4) on the backplane and to the site HS clock source
using HS clock cables. Leave the existing composite clock cables
connected to J42 and J41 (Primary and Secondary BITS).
Chapter 6
Source Timing
6-54
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