Tiel - Siemens Hicom 150 E Office Service Manual

Hicom 150 E Office Rel.1.0 Service Manual - 3.3 Peripheral boards
9 red/brn
10 red/gry
3 11 blk/blu
12 blk/ora
13 blk/grn
14 blk/brn
15 blk/gry
4 16 yel/blu
Group Pair a-wire b-wire SU conn.

3.3.8 TIEL

Introduction
The TIEL (tie line ear & mouth) board provides four two-way analog trunk tie circuits with E&M
signalling for Hicom 150 E OfficePro. Each tie trunk circuit has eight ports, two for incoming speech
paths, two for outgoing speech paths, two for incoming signalling and two for outgoing signalling.
These ports permit tie traffic to other private communication systems.
Speech paths
The speech paths can be switched between four-wire and two-wire mode. Four-wire connection mode
should be used in analog networks to ensure high transmission quality (this description only deals
with four-wire mode).
The advantage of separate speech paths for the incoming and outgoing directions is that the stability
(echo) of a connection is not adversely affected. In addition, the attenuation loss on the line is
compensated by repeaters in the transmission equipment.
E&M signalling paths
The E&M signalling paths are used for exchanging signals that control connection setup and
cleardown. Various types of interface can be selected, depending on the requirements of the partner
system or transmission equipment. These interface types are characterised by different numbers of
wires and different potentials.
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11
brn/red 31
02
gry/red 22
13
blu/blk 33
04
ora/blk 24
15
grn/blk 35
06
brn/blk 26
17
gry/blk 37
08
blu/yel 28
BP: X8
5Ea Basic
access 5 (3/4 TAE8 / 4/5 MW8)
5Eb
5Sa
(6/5 TAE8 / 3/6 MW8)
5Sb
6Ea Basic
access 6 (3/4 TAE8 / 4/5 MW8)
6Eb
6Sa
(6/5 TAE8 / 3/6 MW8)
6Sb
7Ea Basic
access 7 (3/4 TAE8 / 4/5 MW8)
7Eb
7Sa
(6/5 TAE8 / 3/6 MW8)
7Sb
8Ea Basic
access 8 (3/4 TAE8 / 4/5 MW8)
8Eb
8Sa
(6/5 TAE8 / 3/6 MW8)
8Sb
STMD8
Receive
Transmit
Receive
Transmit
Receive
Transmit
Receive
Transmit
Notes