Specifications

Chapter 2 Installation and Operation Installation and Operation Manual
2-4 Normal Indications HS-RN MP-2100/2104 Ver. 12.6, MP-4100 Ver. 2.0
2. When using any of the adapter cables, plug each channel connector at the
other end of the cable into the prescribed user’s equipment connector in
accordance with the site installation plan.
2.4 Normal Indications
The status of each HS-RN channel is indicated by a separate set of indicators.
The normal indications for an operational channel interface are as follows:
• The LOS indicator must be off.
However, it lights up when the corresponding channel loses synchronization
to the HDLC or V.110 frames used by the rate adaptation protocol (received
from the remote end).
When the channel operates at 56 or 64 kbps, no framing is used, and thus the
LOS indicator lights only when the Megaplex main link loses synchronization.
• The TST indicator must be off, but may turn on when a loopback is activated
on the corresponding channel interface.
Note