Mbs Signaling - Nortel DMS-100 Series Maintenance Manual

3-12 Signaling for the Star Remote System
The Star Hub in ESA provides the same tones as a correctly functioning Star
Hub. The UMP card provides tone cadence, which interrupts the tone by
controlling the RCP card. To provide a tone in ESA mode, the UMP sends a
start cadence message to the RCP. This message defines the tone required, the
terminal identification, and the cadence times.
When a make cadence message is received, the Star Hub performs the
following steps:
1. Break terminal current receive path connection, if necessary.
2. Connect the receive path of the terminal to the correct port.
3. Set up the indicated cadence for that tone.
The handling of idle tone also uses the start cadence message. The Star Hub
connects the receive path to a port that provides idle tone.

MBS signaling

The MBS signaling enables call processing software to communicate directly
with the MBS terminal. An above-voice frequency, low-speed data channel
transports the actual MBS messages over the loop. This data channel sends
signaling information over a separate D-channel between the Star Hub and the
host XPM. MBS feature services are described in DMS-100 Business Set
Feature Description and Operation.
The data channel is an 8-kHz signal with data communicated by the presence
or absence of this signal. The following MBS features are supported for the
Star Hub:
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297-8353-550 Standard 05.01 March 2001
Automatic Answer Back
Automatic Dial
Automatic Line
Executive Busy Override
Call Back Queueing
Call Forward All Calls
Call Park
Call Pickup
Call Waiting
End-to-End signaling
Group Intercom
Individual Business Line
Intercom