G3r Hardware Configurations Overview
The G3r with Avaya Communication Manager or Avaya software supports a variety of configurations, consisting of a PPN and up to 21 EPNs. In addition, the system may use a Center Stage Switch (CSS) consisting of one or two Switch Nodes. This information below describes the PPN and EPN cabinets, and the configuration of carriers and circuit packs within these cabinets.
MCC Media Gateway
The MCC Media Gateway (Multi-Carrier Cabinet), J58890A, accommodates from one to five circuit pack carriers, and is always used for the PPN. EPNs may use either multi-carrier cabinets or single-carrier cabinets.
The power unit in the bottom of the MCC cabinet supplies AC voltage or DC voltage from an external source to the power supply in each carrier. The AC-powered cabinet optionally contains a battery charger and backup batteries to provide temporary power to the cabinet if the external source fails. The fan unit in the middle of the cabinet cools the carriers. AC-powered cabinets have two 120V AC receptacles in the back for use as an AC power source.
Each cabinet must be connected to one of the following dedicated power sources:
- 120V AC 60 Hz at 50A from a National Electrical Manufacturing Association (NEMA) 5-50R power outlet or equivalent
- Single phase 240V AC, or three phase 208V AC, 60 Hz at 30A from a NEMA L 14-30R power outlet or equivalent
- -48V DC battery plant
- Global MCC uses 50-60 Hz at 200-240 VAC power source
Processor Port Network Cabinet
The PPN cabinet is the primary cabinet in all G3r systems. It contains the Switch Processing Element (SPE) that controls the system and one Port Network that is interconnected by the daisy-chained TDM / LAN bus. If the system has a CSS, the PPN cabinet also contains a switch node.
The A position always contains a PPN Control Carrier (J58890AP), also known as the Processor Carrier, which holds the SPE circuit packs. If the system has a duplicated SPE, the B position holds a second PPN Control Carrier. At least one, and up to four, Port Carriers (J58890BB) can be located in the other four carrier positions, depending on traffic needs and whether the system uses those positions for other types of carriers. In general, Port Carriers are added in the sequence, B-C-D-E.
If the system has a Center Stage Switch, the E position holds a Switch Node Carrier. In a CSS system with duplicated PNC, the D position holds a Switch Node Carrier that duplicates the one in E position. In large systems requiring a CSS with two Switch Nodes, the second SN is located in an EPN cabinet, for both simplex and duplicated systems. Systems that have added a CSS configuration after the original installation may have their first SN in an EPN cabinet.
Expansion Port Network (EPN) Cabinets
When used for an EPN, the multi-carrier cabinet supports one Port Network with a daisy-chained TDM / LAN bus, or, two separate PNs if the cabinet does not contain a Switch Node. A cabinet with two PNs has two separate TDM / LAN bus daisy-chains.
Each EPN cabinet contains one Expansion Control Carrier (J58890AF) located in the A position. In cabinets with one PN, up to four Port Carriers are added as needed in the sequence B-C-D-E, unless the D or E positions are used for a Switch Node. Cabinets with two PNs use optional Port Carriers in the B position, and then the C position for the first PN (above the fans). The second PN, (below the fans), is configured with the first Port Carrier in the E position and an optional second Port Carrier in D position.
In large systems with a CSS that requires two Switch Nodes, the second SN is located in an EPN cabinet (this is usually cabinet number 2, PN number 2). An EPN with an SN has a Switch Node Carrier in E position. In systems with duplicated PNC, (Critical Reliability option), the D position holds another Switch Node Carrier that duplicates the one in E position.
Carriers in MCC Media Gateways
PPN Control Carrier (J58890AP)
The PPN Control Carrier contains dedicated slots used for circuit packs that compose the switch processing element (SPE). It does not contain port circuit pack slots. This carrier always resides in position A of the PPN cabinet. In a system with a duplicated SPE, a second PPN Control Carrier resides in the B position of the PPN cabinet.
Switch Node Carrier (J58890SA)
Switch Node carriers house the components of a Center Stage Switch (CSS). The first switch node is located in carrier E of the PPN. In a Critical Reliability configuration, its duplicate is located in carrier D of the PPN. The second switch node is located in carrier E of an adjacent EPN. In a Critical Reliability configuration, its duplicate is located in carrier D of the same EPN.
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