PM5381-BI PMC-Sierra, Inc., PM5381-BI Datasheet - Page 539

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PM5381-BI

Manufacturer Part Number
PM5381-BI
Description
ATM UNI, Single Channel ATM PHY Interface for 2488.32Mbps
Manufacturer
PMC-Sierra, Inc.
Datasheet

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13.17.3 Sub-STS-48c Operation
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2000489, Issue 4
Sub-STS-48c functions in the SARC are required for just one function: AIS-P generation to the
APS links when operating in x-connect mode. There is only one SARC in the S/UNI-2488 and it
resides on the first STS-12 timeslots. In this position, it can only process the alarms for an STS-
48c, the first STS-12c, any channels residing in the first 4 STS-3c timeslots, or any channels
residing in the first 12 STS-1 timeslots. It does not do any alarm processing for the remaining 36
timeslots.
When working in the x-connect mode, the channels contained in the STS-48 may consist of
anything from STS-1s to an STS-48c. For each of these channels residing in the first 12
timeslots, the SARC must be configured properly in order for the S/UNI-2488 to generate proper
AIS-P at the SVCA’s output which is connected to the transmit APS port in x-connect mode. For
the remaining 36 timeslots which are not serviced by a SARC, AIS-P generation is accounted for
by the RPAISINS_EN bit in register 0x0902.
The following example shows how proper AIS-P generation is configured for the following
channel set-up:
STS-3c channels in timeslots #1,3, and 4. STS-1 channels in timeslots 2, 6, and 10. Various
channels in timeslots 13 to 48.
·
Repeat steps 1 to 3 by writing the values 0x0003 and 0x0004 into register 0x0720 in step 1 to
configure STS-3c channels residing in master timeslots 3 and 4 respectively. Note that only the
master timeslot of each STS-Nc channel should be configured.
·
Set up STS-3c channel in timeslot #1:
1. Write 0x0001 to register 0x0720
2. Write the value 0x040F to register 0x0724 to enable line AIS assertion for all the possible
3. Set the PAISPTREN, PLOPTREN, and RLAISINSEN register bits in register 0x0072A to
Set up STS-1 channel in timeslot #2:
Write 0x0002 to register 0x0720
Write the value 0x040F to register 0x0724 to enable line AIS assertion for all the major defect
Set the PAISPTREN, PLOPTREN, and RLAISINSEN register bits in register 0x0072A to
defect conditions. Only these defects, which will cause the RHPP to declare AIS-P, can be
enabled.
enable AIS-P generation upon detection of a path AIS pointer defect, a Loss of Pointer
defect, or a receive line AIS (generated by the conditions specified in point#2 above).
conditions. Only these defects, which will cause the RHPP to declare AIS-P, can be
enabled.
enable AIS-P generation upon detection of a path AIS pointer defect, a Loss of Pointer
defect, or a receive line AIS defect (generated by the conditions specified in point#5
above).
S/UNI-2488 Telecom Standard Product Datasheet
Released
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