Nortel DMS-10 Series Installation, Operation And Maintenance Manual page 29

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Section 060-INDP-111
System Description
This section provides a description of the BMC Network Teleprocessing
System. The BMC is a plug-compatible, remotely-accessible replacement for
billing record tape drive units. The BMC provides local storage of billing
records. The BMC is designed to interface directly with the DMS-10 and
DMS-100 Switching Systems. Billing record information captured by the
Switching System is transmitted to the BMC. These records are maintained
by the BMC until a request for polling is received from an authorized Host
Office Controller (HOC). The BMC does not alter call records, but acts as a
storage media until the HOC can remotely access and request call records.
Polling functions are conducted through the use of the BISYNC 3270 or 3780
protocol. New software downloads are offered from a Nortel-based host
using the ASCII protocol (Pollstar not required).
The BMC emulates the tape drives originally used in the Switching System.
All control signals, wait states, and interface requirements for standard tape
drives are duplicated in the BMC by the Tape Emulation Circuit (TEC -
DMS-10 only) or Data Stream Interface (DSI - DMS-100 only) Printed
Circuit Assembly (PCAs). The TEC/DSI PCA interfaces with the Switching
System through existing tape ports and provides the appropriate response to
all control signals, commands, and data transmitted from the Switching
System. This results in a transparent replacement for tape drive units.
The BMC enhances the processing of call record data of the LSSGR by
providing remote access capability. An authorized HOC can access the BMC
through dial-up or dedicated, voice-grade lines. Call records are polled using
the BISYNC (1200-9600 baud) communication protocol. Polling rates are
user-selected up to 9600 baud.
The BMC provides several levels of security. The modems at the BMC and at
the HOC must be compatible. The system passwords must be correct. The
System Administrator can define three levels of security for each command to
the BMC from the maintenance ports. Security varies with the requirements
of the Operating Company.
BMC II BISYNC Operation, Administration, and Maintenance Guide BMCB001 and up
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