Optical port unit protection
In the case of optical port protection (1+1 Linear APS / 1+1 MSP) it is recommended
to place the working port unit and the protection port unit side by side for ease of
maintenance.
Electrical STM-1 port unit protection
In the case of electrical STM-1 port protection two EP155/EL8 circuit packs next to
each other (slot pair positions are: #21/22, #23/24, #25/26, #27/28, #32/33, #34/35,
#36/37, #38/39) and one ECI/155MP8 board at the back side of the subrack must
always be used.
NOTE:
There is no restriction regarding the allocation of the worker and protection
port units within the protection slot pair.
DS3/EC1 equipment protection rules
To accomplish DS3/EC1 transmission (with or without 1+1 equipment protection),
EP51 port units are used in combination with ECI51 interface paddle boards and can
only be inserted in the upper row of the subrack.
In a DS3/EC1 equipment protection configuration, the EP51 worker (W) and protection
(P) port units are adjacently inserted as pairs, as shown in the figure below. The
worker port unit can be flexibly configured on the right hand side or on the left hand
side of the protection port unit.
Figure 5-9 EP51 slot assignment
21
(W / P
or
P / W)
40
31
22
39
32
23
33
24
34
25
35
26
36
27
37
28
38
40
31
01
09
02
12
10
19
03
13
04
14
05
15
06
16
07
17
08
18
11
(W / P
or
P / W)
(W / P
or
P / W)
(W / P
or
P / W)
(W / P
or
P / W)
(W / P
or
P / W)
(W / P
or
P / W)
(W / P
or
P / W)
Power, software and circuit pack installation
Configuration rules
.................................................................................................................................................................................................................................
365-374-187
Issue 1, December 2005
Lucent Technologies - Proprietary
See notice on first page
5-41