Alcatel-Lucent 1643 AMS User's Operation Manual page 592

Performance monitoring
For CTP with a bidirectional path two types of measurements parameters are available:
Measurement Parameters
Forward
Backward
Near end / far end monitoring
In certain applications, it may be desirable to provide performance monitoring data
related to both directions of transmission (transmitted/received) from a single end. The
received data can be relayed back from the remote end to the local end if there is a
bidirectional connection between the nodes. End-to-end bidirectional monitoring
processes consist of two termination points (TPs): one at the local side and one at the
remote side.
The Far End is the local end to the user. The Near End performance parameter is the
data received by the network element at the incoming direction and forwarded to the
managing system. The Far End is the remote end to the user.
The table below identifies where the BIP check is performed during monitoring.
TP
Near End
Far End
In Near-End monitoring, the BIP check indicates the quality of the signal transmitted
from the remote side to the local side.
In Far-End monitoring, the B values is compared with the BIP calculation if an error is
detected on the remote side. An REI is then transmitted upstream. The received REI at
the local side indicates the quality of the signal transmitted from the local side to the
remote side.
....................................................................................................................................................................................................................................
10-10
Description
The BIP is calculated on the received signal and compared with the
B or V5 byte (VC-12).
The BIP is calculated on the sent signal, but at the remote end of the
transmission, and compared with the B or V5 byte (VC12).
Alcatel-Lucent - Proprietary
See notice on first page
Performance measurements
Description
A transmission direction that is referred to
when the signal is ingressing the NE at
that point. The REI is read from the
incoming signal. This will indicate the
quality of the end to end (TP to TP) path
in the opposite direction.
A transmission direction that is referred to
when the signal is egressing the NE at
that point. The REI is read from the
incoming signal on the other side of the
NE. This will indicate the quality of the
end to end (TP to TP) path in forward
direction.
365-312-807R7.2
Issue 4, May 2007