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

Expansion control cabinet for a DEFINITY
Server SI, S8700-series Media Server or S8500 Media Server
SCC1 Media Gateway
An expansion control cabinet (J58890N) is always in the A position in an expansion PN stack of
SCC1 Media Gateways. The expansion control cabinet contains ports. It also contains a TN775
maintenance circuit pack. An AC or a DC power supply resides in the right side of the cabinet.
An expansion control cabinet has optional port circuit packs in port slots 2 to 17.
Fiber-PNC configurations - In fiber-PNC configurations, the expansion control cabinet
contains a tone clock and one or two expansion interface circuit packs to connect to the other
PN(s), a CSS, or an ATM switch. However, if the PN has an IPSI circuit pack for a control
connection to the S8500 or S8700-series Media Server, the tone clock is not used. Instead the
built-in tone clock capability of the IPSI circuit pack is used. In this case, the IPSI circuit pack is
connected by faceplate ribbon cable to the TN775D Maintenance circuit pack.
IP-PNC configurations - In an IP-PNC PN, the expansion control cabinet is necessary in the A
position. It contains a TN775 Maintenance circuit pack in MTCE slot and an IPSI circuit pack in
the tone clock slot. At least one IP Media Processor or IP Media Resource 320 circuit pack is
required in the PN and should be inserted into the A01 position of the expansion control cabinet.
Additional IP Media Processors or IP Media Resources may be inserted in any other cabinets or
slots in the PN. The other slots in an expansion control cabinet can contain optional port circuit
packs.
CAUTION: Inserting
! CAUTION:
the wrong circuit pack into the A01 slot of the expansion control cabinet
may result in no ringing, circuit pack conflicts, and outages when lightning strikes.
The A01 slot should contain only an Expansion Interface circuit pack, an IP
Media Processor, or an IP Media Resource 320.
An IP Media Processor or IP Media Resource 320 can be inserted into almost
any slot in the carrier. But in a conversion from a fiber-PNC to an IP-PNC
configuration, one of these circuit packs should be inserted into the A01 slot that
is vacated by removal of the EI circuit pack.
If the SCC1 PN connects to branch location media gateways or adjuncts in the network,
supports IP endpoints, or uses IP trunks, the following circuit pack is also required:
● TN799DP control LAN (C-LAN) interface on page 244
Issue 6 February 2007 195