4
X
E1/G.703 P
LESIOCHRONOUS
M
ULTIPLEXER
O
PERATING
M
ANUAL
IOA77-1F
5
May 2007
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
6-Tx
5-Rx
4-SG
RS-232
AACK
4
1
2
3
LOES
LDF 10
-3
-6
LOF UA NUA
LOOS 10 RAL ACK ACK
3
4
2
1
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
10
-3
– error rate 10
-3
exceeded
10
-6
– error rate 10
-6
exceeded
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)
Pin
Description
4 SGND
6 Tx
OUT
5 Rx IN
