Signaling Interface - Avaya Nortel Communication Server 1000 Reference
Circuit card reference
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Also See for Nortel Communication Server 1000:
- Manual (570 pages) ,
- Configuration manual (350 pages) ,
- Hardware installation and maintenance (262 pages)
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NT8D15 E and M Trunk card
Card LAN
The card LAN provides a serial communication link for transferring maintenance data and
control signals between the trunk card and the SSC card. The card LAN controls the
microcontroller. The following functions are supported:
• providing card ID/RLS
• reporting self-test status
• polling from the controller card
• enabling/disabling of the DS-30X link
Signaling interface
All signaling messages for the trunk are three bytes long. The messages are transmitted in
channel zero of the DS30X in A10 format.
Configuration information for the E and M trunk is downloaded from the CPU at power up and
by command from maintenance programs. Seven configuration messages are sent. One
message is sent to each unit (4) to configure trunk type, signaling type, balance impedance
etc. Three messages are sent per card to configure the make/break ratio, A/µ-Law
operation.
Signaling and control
The signaling and control portion of the E and M Trunk card works with the system CPU to
operate the card hardware. The card receives messages from the CPU over a signaling
channel in the DS-30X loop and returns status information to the CPU over the same channel.
The signaling and control portion of the card provides analog loop terminations that establish,
supervise, and take down call connections.
Configuration information for the E and M Trunk card is downloaded from the CPU at power-
up and by command from maintenance programs. Configuration messages are sent. One
message is sent to configure trunk and signaling type. The other messages are sent to each
card to select the make/break ratio and the A-Law and µ-Law modes.
The signaling and control circuits on the card perform the following functions:
• provide an interface between the card and the system CPU
- transmit PCM signals from each of the four units to one DS-30X timeslot in A10
format (ready to send/clear to send—flow control, handshake format)
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Circuit Card Reference
Comments? infodev@avaya.com
July 2011
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