Chapter 3 Interfaces and Communications
Confidential and Proprietary Information of ZTE CORPORATION 59
Pin No. and Signals There are totally four 64-pin flat cable sockets: The
upper-left one provides Channels 1 ~ 16; the upper-
right one Channels 17 ~ 32; the lower-left one
Channels 33 ~ 48; the lower-right one Channels 49 ~
63. The upper row of pins of each 64-pin socket is the
positive end of the differential signals, and the lower
row the negative end. It takes two pairs of pins to
provide one pair of E1 channels, the left pair serving as
the transmitting ends and the right pair serving as
receiving ends. Namely, the upper-left 64-pin socket
serves as the following status: From the left to right,
Channel 1 transmits, Channel 1 receives, Channel 2
transmits, Channel 2 receives, Channel 3 transmits,
Channel 3 receives, … Channel 16 transmits, Channel
16 receives. The lower-left one serves as the following
status: From the left to right, Channel 17 transmits,
Channel 17 receives, Channel 18 transmits, Channel
18 receives, Channel 19 transmits, Channel 19
receives, …… Channel 32 transmits, Channel 32
receives. The upper-right one serves as the following
status: From the left to right, Channel 33 transmits,
Channel 33 receives, Channel 34 transmits, Channel
34 receives, Channel 35 transmits, Channel 35
receives, …… Channel 48 transmits, Ch
Connector One 64-pin SCI carrier socket for each 64-pin flat cable
socket
Configuration At most four carrier sockets and 16 × 8-core cables for
each LIU
Cable
75 Ω micro-coaxial cable
S.N. 2 (E1BU)
Signal
Line Signal E1
Pin No. and Signals There are totally two 64-pin flat cable sockets. The
upper one provides Channels 1 ~ 16, and the lower
one Channels 17 ~ 32. The upper row of pins of each
64-pin socket is the positive end of the differential
signals, and the lower row the negative end. It takes
two pairs of pins to provide one pair of E1 channels,
the left pair serving as the transmitting ends and the
right pair serving as receiving ends. Namely, the pins
of the upper 64-pin socket serve as following status:
From left to right, Channel 1 transmits, Channel 1
receives; Channel 2 transmits, Channel 2 receives;
Channel 3 transmits, Channel 3 receives; …… Channel
16 transmits, Channel 16 receives. The pins of the
lower 64-pin socket serve as following status: From
left to right, Channel 17 transmits, Channel 17
receives; Channel 18 transmits, Channel 18 receives;
Channel 19 transmits, Channel 19 receives; ……
Channel 32 transmits, Channel 32 receives.
Connector One 64-pin SCI carrier socket for each 64-pin flat cable
socket
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