Modes Of Operation; Figure 7-9: Stm -1/4 Core Card Equipping Options - Ericsson Marconi OMS 1200 Product Description

The slave switch, following reconfiguration, signals completion of switch plane
changeover and after a delay of 500ms, the MC releases suspension of the protection
mechanisms and alarms.
In case of failure of Switch A, while Switch B is operating correctly, the fault is reported
to the Multiplexer Controller, this puts Core Unit A out-of-traffic. The Multiplexer
Controller then instructs all destination ports to continue to select Switch B even if a
fault on that unit is detected.
If both core units fail simultaneously, no switchover occurs and the Multiplexer
Controller is informed of the failures.
7.7.2

Modes of Operation

It is possible to commission the system with either one or two core cards. Equipping
options of core cards and their SDH line interface modules are shown in Figure 7-9.
Figure 7-9: STM –1/4 Core Card Equipping Options
221 02-ZAP 701 25/1 Rev C 2006-08-04
03PHB00004AAV-CUA
STM 1/4 CORE CARD
LINE LINE
WEST EAST
'A'
STM 1/4 CORE CARD
LINE
EAST
'A'
STM 1/4 CORE CARD
LINE
WEST
'B'
STM 1/4 CORE CARD
LINE LINE
WEST EAST
'A'
STM 1/4 CORE CARD
LINE LINE
WEST EAST
'B'
Marconi OMS 1200
Technical Product Description
Single Core Card
Linear MSP (Terminal)
SNCP (ADM)
Duplicated Core Card
Linear MSP (Terminal)
SNCP (ADM)
Duplicated Core Card
Linear MSP
SNCP (ADM)
Full Core Card and Traffic Card Protection
possible
© Ericsson AB 2006
Commercial in confidence
108
(136)