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Circuit Pack Descriptions
7-14 Issue 3 June 2001
Order wire Interface 7
The BBG9 OHCTL provides order wire capability via the overhead E1 byte. An
external analog to digital converter supplying 64 kb/s data and clock signals is
required to use this capability.
BBG9 OHCTL Quick Reference Summary 7
Functions 7
Major functions of the OHCTL circuit packs are as follows:
■ SONET overhead communications channel interface to OLIU circuit packs
■ An X.25 message-based OS interface
■ External order wire interface
■ Inventory information (
CLEI
code, date of manufacture, etc.)
■ Intra-office (IAO) LAN interface.
DDM-2000 OC-3 R13.0 and OC-12 R7.0 support an IntrAOffice LAN (IAO
LAN) interface for operations data communications.
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