Siemens Hicom 150 E Office - Tiel

9 red/brn 11 5Ea Basic
access 5
Receive
(3/4 TAE8 / 4/5 MW8)
brn/red 31 5Eb
10 red/gry 02 5Sa Transmit
(6/5 TAE8 / 3/6 MW8)
gry/red 22 5Sb
3 11 blk/blu 13 6Ea Basic
access 6
Receive
(3/4 TAE8 / 4/5 MW8)
blu/blk 33 6Eb
12 blk/ora 04 6Sa Transmit
(6/5 TAE8 / 3/6 MW8)
ora/blk 24 6Sb
13 blk/grn 15 7Ea Basic
access 7
Receive
(3/4 TAE8 / 4/5 MW8)
grn/blk 35 7Eb
14 blk/brn 06 7Sa Transmit
(6/5 TAE8 / 3/6 MW8)
brn/blk 26 7Sb
15 blk/gry 17 8Ea Basic
access 8
Receive
(3/4 TAE8 / 4/5 MW8)
gry/blk 37 8Eb
4 16 yel/blu 08 8Sa Transmit
(6/5 TAE8 / 3/6 MW8)
blu/yel 28 8Sb
Group Pair a-wire b-wire SU conn. STMD8 Notes
BP: X8
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.
Hicom 150 E Office Rel.1.0 Service Manual - 3.3 Peripheral boards
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