Tmew2 - Siemens HiPath 3000 Series Service Documentation

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3.3.41

TMEW2

NOTE
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Danger of damage to property due to surge voltage. The required lightning protec-
tion measures must be taken for this board, see Section 2.1.2, "Lightning Protec-
tion".
Introduction
The TMEW2 board (Trunk Module for E&M World) provides four analog tie trunk circuits for
E&M signaling for HiPath 3800. Each tie trunk circuit has eight connectors: incoming speech
path (2), outgoing speech path (2), incoming signaling (2) and outgoing signaling (2). This al-
lows tie trunk traffic to other private communication systems.
Interface types 1A and 5 are released for E&M networking with the Immediate Start, Wink Start,
and Delay Dial protocols. Interface types 1A and 5 are identical.
For Thailand only: As of HiPath 3000/5000 V9, different impedance/level values can be select-
ed. The setting is made via HiPath 3000/5000 Manager E (Station View – Template Editor). The
board must be reset after any change to the impedance/level value.
The peripheral board slots on the HiPath 3800 are fitted with SIPAC 9 SU connec-
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tors. Since the TMEW2 board has SIVAPAC connector strips, you will have to install
a SIVAPAC-SIPAC board adapter in order to be able to use it in HiPath 3800.
For information on this procedure, please see Section 4.1.5.5.
Note on E&M networking compatibility
TMEW2 does not support E&M interface types 1, 1B, 2 and 3 on the TIEL board.
The following options are available when replacing a HiPath 3750 or HiPath 3700 system with
a HiPath 3800 system:
1. Switch customer-specific E&M networking to interface type 1A (or 5) on the TMEW2
board (Immediate Start, Wink Start or Delay Dial protocols).
2. If option 1 is not possible for technical reasons, HiPath 3750 or HiPath 3700 remains
active as the E&M gateway. Create a TDM network with the CorNet protocol between
the HiPath 3750 or HiPath 3700 system and HiPath 3800.
Speech paths
Speech paths always use four wires (two wires for the incoming speech path and two wires for
the outgoing speech path). The advantage of separate speech paths for the incoming and out-
going directions is that the stability (echo) of a connection is not adversely affected. In addition,
repeaters in the transmission equipment compensate for attenuation loss on the line.
A31003-H3590-S100-7-7620, 06/2012
HiPath 3000/5000 V9, Service documentation
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Boards for HiPath 3000
Peripheral boards
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