Figure 4.52 Wiring An Lax Or Lmx Card - Aastra AXD Installation And Maintenance Manual

The principle for wiring an analogue set is shown in the diagram below:
8 1
Carte LAx ou LMx
Each line is supplied with balanced direct current. This voltage may vary between -43 V
and -56 V.
The maximum line resistance for a 22mA current is 1000 Ohm. The maximum line current
for a 200 Ohm resistance is 40 mA. With the "set on hook" the permanent line current can
reach 2.5 mA maximum without interference.
The wiring constraints are:
• maximum line length:
- 0.4 mm wire: about 2 km,
- 0.6 mm wire: about 3.5 km.
Installation and Maintenance Manual - Aastra 5000
Description des sous-ensembles
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Figure 4.52
WIRING AN LAX OR LMX CARD
AMT/PTD/PBX/0058/4/6/EN
01/2011
Connecteur
8 plots
1 3
4
5
Page 263