Hardware Description and Reference for Avaya ... - Avaya Support

Configurations
SCC1 Media Gateways come in four configurations:
SCC1 Media Gateway
● A control cabinet, for DEFINITY Server SI only, that contains a TN2404 processor, tone
clock, and a power converter. The control cabinet forms the basis for the SI processor port
network (PPN). A control cabinet is always in the A position of an SCC1 stack.
● A duplicated control cabinet, for DEFINITY Server SI only, that contains the same
equipment as the control cabinet. The duplicated control cabinet provides duplicated
control in an SI PPN. A duplicated control cabinet is always in the B position of an SCC1
stack.
● An expansion control cabinet that contains port circuit packs, interfaces to the PPN (SI
only) or media server (S8700-series/S8500), interfaces to other PNs, a maintenance
interface, and a power supply. The expansion control cabinet is always in the A position of
an SCC1 stack that is PN only for DEFINITY Server SI.
● A port cabinet that contains port circuit packs, interfaces to other PNs, and a power supply.
A port cabinet can be part of a PPN or a PN. A port cabinet can also contain an interface to
the media server if it is in a duplicated control (high reliability) or duplicated control and
bearer (critical reliability) system.
A maximum of four SCC1 Media Gateways can be stacked to form a single PN. The position of
the basic control cabinet or expansion control cabinet is always labeled A. Additional
port-cabinet positions are sequentially labeled B, C, and D.
A duplicated control cabinet, if any, is installed in position B. The following figure shows an
example of a stack of SCC1 Media Gateways.
Issue 6 February 2007 189