Huawei eSpace U1900 Series Quick Installation Manual page 11

c
Assembling the RJ48C Connector (for 120-ohm E1 Cables)
The 75-to-120 ohm E1 trunk balun box can convert 75-ohm unbalanced single-ended
signals of the device to 120-ohm balanced differential signals so that the device can
connect to a variety of peer devices through E1 trunks. If the peer connector is not
RJ48C, you can reassemble a RJ48C connector by referring to the pin assignment. If
you do not have a RJ48C connector, use a RJ45 connector instead.
75-to-120 ohm E1 trunk
balun box
d
Assembling the RJ11 Connector (for High-Density User Cables)
The high-density user cable delivered with the device has no RJ11 connector assembled.
If you need a RJ11 connector, find the wire pair in the following table, strip off the jacket
of the twisted-pair cable, insert the twist pair into the middle pins of the RJ11 connector,
and use a crimping tool to crimp the connector. The following table describes the pin
assignment of high-density user cables when they connect to the ASI and OSU boards.
High-density user cable
(DB68B connector)
Pos.1
DB68B
RJ11
Pin Foot
36/35
38/37
40/39
42/41
44/43
46/45
48/47
50/49
2/1
4/3
6/5
8/7
10/9
12/11
14/13
16/15
Pos.68
54/53
56/55
58/57
60/59
62/61
64/63
66/65
68/67
20/19
Cable pairs
22/21
24/23
26/25
28/27
Adhesive
30/29
tape
32/31
34/33
75-ohm Signal Side
Pin Foot
RX+/RX-
TX+/TX-
Tape Wire Pair
Blue/White
Orange/White
Green/White
Brown/White
Gray/White
Blue/Red
Blue Orange/Red
Green/Red
Brown/Red
Gray/Red
Blue/Black
Orange/Black
Green/Black
Brown/Black
Gray/Black
Blue/Yellow
Blue/White
Orange/White
Green/White
Brown/White
Gray/White
Blue/Red
Orange/Red
Orange
Green/Red
Brown/Red
Gray/Red
Blue/Black
Orange/Black
Green/Black
Brown/Black
Gray/Black
Blue/Yellow
11
120-ohm Signal Side
Port
Pin Foot
RX IN 4/5
TX OUT 1/2
Port (ASI) Port (OSU)
FXS-0
FXS-1
FXS-2
FXS-3
FXS-4
FXS-5
FXS-6
FXS-7
FXS-8
FXS-9
FXS-10 FXO-10
FXS-11
FXS-12
FXS-13
FXS-14
FXS-15
FXS-16
FXS-17
FXS-18
FXS-19
FXS-20
FXS-21
FXS-22
FXS-23
FXS-24
FXS-25
FXS-26
FXS-27
FXS-28
FXS-29
FXS-30
FXS-31
FXO-0
FXO-1
FXO-2
FXO-3
FXO-4
FXO-5
FXO-6
FXO-7
FXO-8
FXO-9
FXO-11
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FXS-0
FXS-1
FXS-2
FXS-3
FXS-4
FXS-5
FXS-6
FXS-7
FXS-8
FXS-9
FXS-10
FXS-11
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