Ringing In The Universal Edge 9000 - Nortel DMS-100 Series General Description Manual

Ringing in the Universal Edge 9000

The architecture of the POTS functionality in the Universal Edge 9000 (UEN)
borrows heavily from the LCM. This is because the time division multiplexing
(TDM) software functions the same as that of the LCM in the DMS-100
system. The UEN
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Each UEN DMS frame contains up to four physical UEN DMS shelves. Each
UEN DMS shelf consists of 21 card positions that contain up to:
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Slot 1 contains two half-height cards:
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Each UEN shelf consists of 16 line cards that offer voice service. The UEN
shelf also contains two TDM common equipment cards. The TDM cards are
redundant and able to support from 2-6 DS-30B connections in each shelf to
the host PM, for a maximum of 12 DS-30B in each frame.
Each line card with voiceband services has its own ringing generator. There are
no hardware resources present in the shelf to synchronize operation of these
ring generators. Hardware and software resources on the line card and at the
TDM interface cards monitor the operation of the ringing generator on each
line card to detect and report overload and failure conditions.
The following figure provides a front view of the UEN shelf assembly
showing slot assignments and line card / line subgroup numbering schemes.
interfaces to an LGC, LTC, or RCC2
provides redundancy down to the node level (for example, each unit in the
node can take over the mate unit's call processing in the event of a failure)
concentrates voice channels (that is, more in-service lines are supported in
UEN than there are voice channels to the host PM)
supports World line card (WLC) POTS line cards
16 multi-circuit line cards
2 TDM (voice) control cards
2 data control cards (future)
one power input/output card
one shelf interconnect card
Ringing in Series II peripherals 3-45
DMS-100 Ringing System