Frame Supervisory Panel; Additional Opm Components; Hie Components; Remote Maintenance Module - Nortel DMS-100 Series Maintenance Manual

5-4 OPM hardware
DS30A ports of the LCM are mapped to the DS-1 interface cards in the HIE.
Data travels through the DS-1 links to the host.
One LCC is present in the HIE for each LCM unit (LCA shelf). In normal
operation, the two LCCs connect alternately to even and odd LCAs. If an LCC
fails in the HIE, the mate LCA can handle all the DS-1 links.
Each LCC locks the frequency of the LCC to the primary DS-1 link. This
action allows each LCC to function as a clock. The host LTC/LGC drives both
LCC clocks. One of the LCCs becomes the primary LCC the host LTC/LGC
directs. The primary LCC frequency locks to the C-side primary link to
synchronize to the timing downloaded by the host peripheral of the primary
LCC. The other LCC frequency locks to the primary LCC to derive the timing
of the other LCC. The LCC clock functions serve both the DCCs and if the
RMM is provisioned the Remote Maintenance Module (RMM).

Frame supervisory panel

The OPM is provisioned with a frame supervisory panel (FSP) (NT6X25AA)
or a remote FSP (NT6X25BA). The FSP provides interface between the power
distribution center in the FSP and the power converters in the LCM. The FSP
also contains alarm circuits to monitor under-voltage conditions from the
power converters.

Additional OPM components

HIE components

In order for the OPM to function with emergency stand-alone (ESA)
capability, the HIE shelf must contain the following additional cards:
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Remote maintenance module

An optional component of the OPM is the RMM (NT6X13AB). The RMM
shelf assembly (NT6X1301) contains the RMM. The RMM is a single-shelf
module based on the maintenance trunk module (MTM). The RMM provides
maintenance and service capabilities for the OPM. The RMM consists of two
power converters, an RMM control card, a codec and tone card. The RMM
contains space for a maximum of 14 provisionable service cards.
The RMM contains one set of common cards (NT6X13AB). The common
cards in the RMM are as follows:
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297-8361-550 Standard 04.01 September 2000
NT6X45AF—XPM processor card
NT6X47AC—4Mb master processor memory plus card
NT6X75AA—ESA clock and tone card
NT2X59AA—Group codec
NT6X74AB—RMM control