Nortel DMS-100 Series Maintenance Manual page 94

2-18 Functional overview
Figure 7 LCC interface to DS-1 interface cards
The LCC provides system clocks for the DCC, RMM and LCM. When both
units of the LCM are active, LCC-0 is frequency-locked to the primary DS-1
link of the LCC-O. The LCC-1 clock is locked to LCC-0. The two LCC
clocks derive timing from the host LTC.
297-8361-550 Standard 04.02 December 2004
DS-1 links 0
DS-1
interface
card
DS30A links
LCA-0
To host office
2 4
DS-1
interface
card
I/S
LCC-0 LCC-1
RMM
5 1 3
DS-1
interface
card
I/S: intershelf link
DS30A links
LCA-1