Auxiliary Interfaces; Kb/S Channel Characteristics; Service Telephone/Orderwire Interfaces - Nera Evolution Series Technical Description

6.4.

Auxiliary interfaces

6.4.1.

64 kb/s channel characteristics

Two 64kb/s user channels are available.
Interface alternatives:
•
Two 64kb/s according to ITU-T G.703, Co-directional timing or
•
One 64kb/s according to ITU-T G.703, Contra-directional timing and one 64kb/s according to
ITU-T V.11, Contra-directional timing without byte timing
Connector type:
6.4.2.

Service telephone/Orderwire interfaces

The unit has four RJ-45 connectors, one for handset and three for analogue connections (east/west
bridging).
Telephone connector type:
The performance of the service telephone complies in general with ITU-T Rec. G.712:
•
Code:
•
Signalling:
•
Frequency range:
•
Impedance
The unit has three 4-wire analogue interfaces for connection to other service channel equipment:
OE1 and OE2 Interfaces:
•
Not Galvanic Isolated.
•
Input/output level
4 Wire Interface:
•
Galvanic Isolated
•
Input/output level:
The EOW is transported in one of the two available 64 kb/s channels.
NGP\00329 Rev. C 23-06-2006
RJ-45
RJ-45 (IEC 60603-7)
PCM
DTMF according to ITU-T Rec. Q.23
0.3 – 3.4 kHz
600 Ω
-6 dBm
4 dBm, 0 dBm -6 dBm (Nominal) and -10 dBm.
Evolution Series - XPAND 39