363-206-285
Operations Interfaces
6-18 Issue 3 June 2001
Order Wire 6
The DDM-2000 OC-3 Multiplexer uses the E1 byte in the SONET overhead and
provides a 64 kb/s complimentary metal oxide semiconductor (CMOS) or
transistor-transistor logic (TTL) compatible interface to an external order wire shelf
to provide point-to-point voice communication between DDM-2000 OC-3 systems.
The order wire shelf must be installed within 3 feet of the DDM-2000 OC-3
Multiplexer to which it is connected.
The order wire is available only between DDM-2000 OC-3 shelves connected to
each other via OLIUs in the Main slots. In multi-span applications order wire
communication is available only between the CO and the first RT.
The BBG10 OHCTL provides enhanced order wire capability (intended for
MegaStar
applications). Six 64Kb/s overhead channels (E1, E2, and F1 from two
OLIUs) are multiplexed onto a DS1 interface for connection to an external
Channel Service Unit. The DS1 interface uses the same connector (J51) normally
used for the E1-Only interface.
The E1-Only interface of the DDM-2000 OC-3 Multiplexer has been tested with
the
DANTEL
*
Order Wire Assembly A18-04588-02, and the multiplexed order wire
interface has been tested with the Harris/Farinon CSU.
* Registered trademark of Dantel, Inc.
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