Pdh 34/45M/140M And Sdh Stm-1 Tributary Card Protection - Ericsson Marconi OMS 1200 Product Description

7.8.4

PDH 34/45M/140M and SDH STM-1 Tributary Card Protection

The term Medium Bit-rate (MB) protection refers to 34/45M, transmux card type
protection schemes. The term High Bit-rate (HB) protection refers to 140M and STM-1
card type protection schemes.
7.8.4.1 MB/HB Protection Architecture (OMS 1240 Only)
The scheme supports a variety of protected card types in the two tributary slots with
LTU access limits as follows:
•
•
•
•
•
Note:
7.8.4.2 Modes of Operation (OMS 1240 Only)
Tributary cards may operate with or without 1:1 protection. Tributary cards in slot
S1_02 only operate as an unprotected card or as a protection card.
Switching traffic from the protected card to the protection card can be automatic under
the Multiplexer Controller control, with switching carried out based on fault conditions
reported by the protected tributary card. Manual switching, under operator control, is
also possible (refer to Section 7.8.2 above).
7.8.4.3 MB/HB Protection Architecture (OMS 1260 only)
The scheme supports a variety of protected card types in the seven tributary slots with
LTU access limits as follows:
•
•
•
•
Note:
221 02-ZAP 701 25/1 Rev C 2006-08-04
03PHB00004AAV-CUA
1:1 34/45M card protection for one card (3 ports)
1:1 34M transmux protection for one card (1 ports)
1:1 140M card protection for one card (1 ports)
1:1 STM-1 card protection for one card (1 port)
1:1 dual port STM-1 card protection for 1 card (2 ports).
In each of the above card type configurations the worker card is placed in
Tributary Slot S1-01 and the protection card in Tributary Slot S1_02.
1:n 34/45M card protection for four cards (12 ports)
1:n 34M transmux protection for four cards (4 ports)
1:n 140M card protection for four cards (4 ports)
1:n dual port STM-1 card protection for four cards (8 ports).
In each of the above card type configurations the worker card is placed in
slots following the rules explained in Table 7-3, and Table 7-4
Marconi OMS 1200
Technical Product Description
© Ericsson AB 2006
Commercial in confidence
121
(136)