Connectors And Indicators; Introduction; Multiplexer; View And Description Of Tm-77 Front Panel - Lanex TM-77 Operating Manual

2 C
ONNECTORS AND INDICATORS
2.1

Introduction

Device versions differ from each other with the type of the used optical elements. There
are no differences in the mechanical structure.
TM-77.1
MULTIPLEXER 4xE1
2.2 TM-77 multiplexer
1 - power supply indication diode
2 - supervision connector
3 - group of signaling diodes:
LOES – loss of E1 interface input signal
LOOS – loss of optical receiver input signal
LDF– laser diode failure (loss of optical transmitter output power)
LOF – loss of frame synchronization of received signal
-3
10 – error rate 10
-6
10 – error rate 10
RAL – remote alarm
group of alarm condition signaling diodes:
UA – urgent alarm
ACK – acknowledgement of urgent alarm
NUA – non-urgent alarm
ACK – acknowledgement of non-urgent alarm
4- AACK – alarm acknowledgment button
Figure 3. View and description of TM-77 front panel
The device is equipped with V.28 interface enabling multiplexer management from VT100
terminal level. The interface is described in Table 2.
Table 2. Description of RS-232 / V.28 DCE connector outputs (RJ-45 type)
IOA77-1F
4 E1/G.703 P
X LESIOCHRONOUS
O
PERATING
RS-232
-3
exceeded
-6
exceeded
Pin
4
6
5
M
ULTIPLEXER
M
ANUAL
4-SG
5-Rx
6-Tx
LOES
2 4 LOOS 10 RAL ACK ACK
1 3 LDF 10
1
2
Description
SGND
Tx
Rx
5
3
-6
AACK
-3
LOF UA NUA
4
OUT
IN
May 2007