Signal Processing Node; 68K Card; Vp12 Card; 68K Transition Module - Northern Telecom DMS-100 Series Manual

Signal processing node

The Signal Processing Node (SPN) provides the voice processing for the
DMS VoiceMail system. Each SPN has a maximum capacity of 24
channels. SPNs are configured in pairs. If one SPN fails, the overall system
capacity is diminished. However, since SPNs are paired (that is SPNs 1-2,
3-4, 5-6, etc.), all users of a failed SPN can still gain access to their
mailboxes through the other SPN.
The SPN consists of three types of cards:
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•
•

68K card

The 68K card, commonly referred to as the single board computer (SBC)
card, provides per-channel processing, and relays timeslot assignments to
the voice taps on the VP12 cards from the Multiserver Processor (MSP).

VP12 card

The VP12 card provides signal processing for 12 channels and
communicates with the 68K card through shared memory, and control and
status registers.

68K transition module

The 68K transition modules provides the SCSI and serial data port
connections for the node.
one 68K card
two VP12 cards
one 68K transition module
Note: The user interface of DMS VoiceMail system uses the term single
board computer.
DMS VoiceMail Trouble-locating and alarm-clearing procedures SPM 02
5-1