Functional description
MPR-e and MSS-1c User Manual 3DB19901EFAA Edition 01 155
3.10.8.9 — Link identifier
The number of microwave links, especially in urban areas, might cause interference during
installation and the turn-up phase.
The digital frame incorporates link identity coding capabilities to prevent the capture of an
unwanted signal.
If a “Link Identifier Mismatch” occurs all traffic is dropped.
The Link identifier management function can be enabled or disabled by the management
system.
3.10.8.10 — Loopbacks
To facilitate installation/commissioning and remote maintenance, two loopbacks are
available.
As the activation of a loopback affects traffic, the presence of a loopback is indicated to the
management systems as an abnormal condition.
The supported loopbacks are shown in Figure 3.65.
Figure 3.65 — Available loopbacks
The following loopbacks are provided by the MPT-HC/HC-HQAM/MC/XP/XP-HQAM:
• Line Side loopback: this loopback routes data from the output of the Tx Data
Awareness block (after compression) to the input of the Rx data awareness block
(decompression). This is an internal loopback.
• It is a Loop and Continue loopback. It is possible to enable this loopback only at
aggregate level.
When this loopback is activated, the behavior is as follows:
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