E1 interfaces (Main board/X16E1-V3 card)
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Purpose
2048 kbit/s E1 inputs and outputs can be connected to these interfaces either via 120 Ω
cables (symmetrical) or 75 Ω cables (coaxial).
Connector data
The E1 connectors which are located on the main board and/or on the X16E1-V3
option card are RJ45 connectors with metal shell for grounding. It must be ensured that
the connector metal shell has good contact with the cable shield.
Table 4-11 Pin assignment (E1 cables)
Point on
Connector
Signal Name
(120 Ω, symmetrical)
Signal Name
(75 Ω, coaxial)
1 TX positive (a-wire) Braid of TX coaxial
2 TX negative (b-wire) nc
3 nc Inner conductor of TX coaxial
4 RX positive (a-wire) Braid of RX coaxial
5 RX negative (b-wire) nc
6 nc Inner conductor of RX coaxial
7 GND GND
8 GND GND
Cable data (120 Ω, symmetrical)
Preferably shielded twisted pair cables should be used (22 or 26 AWG).
Cable data (75 Ω, coaxial)
Preferably MiniCoax 75 Ω 2.5 mm cables should be used.
Figure 4-34 E1 connector
1
8
System cabling
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365-312-802R7.2
Issue 4, June 2007
Alcatel-Lucent - Proprietary
See notice on first page
4-33
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