User guide

NOTE: BERT is supported on the PDH interfaces of the Channelized
SONET/SDH OC3/STM1 (Multi-Rate) MIC with SFP and the DS3/E3 MIC.
The following BERT algorithms are supported:
all-ones-repeating Repeating one bits
all-zeros-repeating Repeating zero bits
alternating-double-ones-zeros Alternating pairs of ones and zeros
alternating-ones-zeros Alternating ones and zeros
repeating-1-in-4 1 bit in 4 is set
repeating-1-in-8 1 bit in 8 is set
repeating-3-in-24 3 bits in 24 are set
pseudo-2e9-o153 Pattern is 2^9 - 1 (per O.153 standard)
pseudo-2e11-o152 Pattern is 2^11 - 1 (per O.152 standard)
pseudo-2e15-o151 Pattern is 2^15 - 1 (per O.151 standard)
pseudo-2e20-o151 Pattern is 2^20 - 1 (per O.151 standard)
pseudo-2e20-o153 Pattern is 2^20 - 1 (per O.153 standard)
pseudo-2e23-o151 Pattern is 2^23 (per O.151 standard)
Table 5 on page 90 shows the BERT capabilities for various interface types.
Table 5: BERT Capabilities by Interface Type
CommentsT3 BERTT1 BERTInterface
•
Limited algorithmsYes (ports 0–11)12-port T1/E1
Circuit Emulation
•
Limited algorithmsYes (port 0–3)4-port
Channelized
OC3/STM1
Circuit Emulation
•
Single port at a time
•
Limited algorithms
Yes (port 0–3)Yes (port 0–3)E1 or T1
•
Single port at a timeYes (port 0–3)Yes (port 0–3)E3 or T3
•
Single channel at a time
•
Limited algorithms
•
No bit count
Yes (channel
0–11)
N/AChannelized
OC12
•
Multiple channels
•
Only one algorithm
•
No error insert
•
No bit count
N/AYes (channel
0–62)
Channelized
STM1
•
Multiple ports and channels
•
Limited algorithms for T1
•
No error insert for T1
•
No bit count for T1
Yes (port 0–3 on
channel 0)
Yes (channel
0–27)
Channelized T3
and Multichannel
T3
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E1 Interfaces Feature Guide for Routing Devices