Carrier Access Wide Bank 28 DS3 User Manual page 59

Pulling or "hot-swapping" a card when circuit failures exist on other cards produces the following
lockout behavior, depending on the card type.
If a Standard card is pulled when the spare is already being used, all four circuits on the
Standard card will be dropped. The spare circuits will not be affected.
If an MSO Electronics card is pulled when the spare is already being used, the low-speed
circuits using the spare will be kicked off the spare and will be dropped. All four circuits on
the pulled card will be moved to the spare card.
Group
A
B
C
D
Wide Bank 28 DS3 - Release 2.4
Table 2-3 Low-Speed Circuit Groups for Spare Switching
Active Circuit
01 (First circuit on Card 1)
05 (First circuit on Card 2)
09 (First circuit on Card 3)
13 (First circuit on Card 4)
17 (First circuit on Card 5)
21 (First circuit on Card 7)
25 (First circuit on Card 7)
02 (Second circuit on Card 1)
06 (Second circuit on Card 2)
10 (Second circuit on Card 3)
14 (Second circuit on Card 4)
18 (Second circuit on Card 5)
22 (Second circuit on Card 6)
26 (Second circuit on Card 7)
03 (Third circuit on Card 1)
07 (Third circuit on Card 2)
11 (Third circuit on Card 3)
15 (Third circuit on Card 4)
19 (Third circuit on Card 5)
23 (Third circuit on Card 6)
27 (Third circuit on Card 7)
04 (Fourth circuit on Card 1)
08 (Fourth circuit on Card 2)
12 (Fourth circuit on Card 3)
16 (Fourth circuit on Card 4)
20 (Fourth circuit on Card 5)
24 (Fourth circuit on Card 6)
28 (Fourth circuit on Card 7)
Spare Circuit
1 (first circuit on spare)
2 (Second circuit on spare)
3 (Third circuit on spare)
These circuits are not used when low-
speed cards are E1
4 (Fourth circuit on spare)
July 2004
Product Description
Low-Speed (LS) Redundancy
2-23