Lucent Technologies WaveStar OLS 40G, Руководство по установке

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G-2
Issue 1.0 March 2001
365-575-389
Installation Manual
Related Equipment
Overview
Dantel Orderwire OLS fully supports 64-kb/s orderwire use. Line and Selection Orderwire channels
(E2 and E1 bytes) are supported by the OLS. Line Orderwire is carried between
adjacent nodes.
The current Section or Line Orderwire system provides basic party-line service;
any person can pick up the handset form the front of the Dantel unit and
immediately speak to anyone else on the system. Voice party-line capability is the
nominal state of this system and is operational as long as the fiber line between
the Orderwire sites is good. Figure G-1 on page G-5 shows an example
application of the current orderwire system in an OLS. Unlike the section DCC
and payload, the E1 byte of the section overhead is not automatically protected
from fiber cuts or other transmission-affecting impairments. The Orderwire Sets
can also provide bridging between orderwire channels in the East and West
directions that allows for orderwire connectivity around the ring.
Remove CMC access is also possible from any site to the other site over the
orderwire by using the internal and external 1200 baud modems. The orderwire
cannot be used for voice and CMC access simultaneously.
In ring applications, one of the nodes should be chosen as the break point (it is
recommended the TID associated with the DS-NE be the break point) to avoid
oscillating audio in the system. At this node, the Dantel is configured in terminal
mode
1
so that the Dantel channel 1 is the operational channel and channels 1 and
2 (East and West directions) are not bridged. The SONET section orderwire (E1
byte) is not automatically protected from fiber cuts or other transmission failures
so a transmission failure somewhere in the ring can cut off the orderwire service
to some nodes. For most single failures in a ring, orderwire access to nodes that
have been cut off by the failure can be accessed by simply swapping the East and
West orderwire connectors.
For voice application, the system operates as a standard orderwire when you pick
up the handset on the front of the orderwire panel and call someone at a remote
terminal (station 1 code). The voice circuit uses channel 1 of the system.
For data circuit applications, dial a different number (station 2 code) to call the
same remote terminal to set up a data communications path.
(Continued on next page)
1. The switch and strap settings for terminal mode will be described in the final version of the Dantel practice.