Alcatel-Lucent 1643 AMS User's Operation Manual page 680

Engineering orderwire concepts
Engineering orderwire
...................................................................................................................................................................................................................................
General description
For 1643 AM, only EOW for STM-1(1), STM-1(2) is available and there are only two
user ports, V.11(1) and V.11(2). V.11(1) is connected to STM-1(1) and V.11(2) is
connected to STM-1(2).
An external orderwire system can be connected which uses this orderwire channel for
transparent data transmission via the 1643 AM transmission network.
The RJ45 connectors to be used for connecting this external orderwire systems are
located at the backside of the 1643 AM and have the designation
E1 and E2 bytes
For this functionality the bytes E1 and E2 are used as orderwire channels. The RSOH
byte E1 is accessible in all network element types, the MSOH byte E2 is only
accessible in the multiplexers. The E1 and E2 bytes of both STM-1 interfaces are
permanently assigned to User Byte ports.
PCM signals
The data received or transmitted via the G.703 interface represents pulse code
modulated signals of voice frequency according to ITU-T Rec. G.711. As encoding rule
the A-law is used.
Please note that feedback paths must not occur within an orderwire network. An
external orderwire system can therefore only be connected in networks which have no
feedback paths. This functionality is only available in meshed networks or networks
with a ring structure, if these network structures are interrupted between two NEs for
the orderwire traffic.
Number of orderwire branches per NE
There are two orderwire branches per network element, one for the STM-1(1) interface
and one for the STM-1(2) interface. Each one gives access to the E1 byte and to the
E2 byte.
Call occupies the entire channel
A call always occupies the entire channel, i.e. only one call can be made at any given
time via this orderwire channel.
Channel control
The channel control and call signaling are taken over by the connected external
orderwire system, and the 1643 AM transmission network serves only as a transmission
medium. ITM CIT does not provide any setting options.
...................................................................................................................................................................................................................................
13-2 Alcatel-Lucent - Proprietary
See notice on first page
E1 TP1 and E1 TP2 .
365-312-807R7.2
Issue 4, May 2007