Specifications

Summary of services
28 Administration for the Avaya G450 Media Gateway
See Chapter 2: Optional components for information about the S8300 Server module.
Configuring G450 options
The G450 provides the following configuration options to help you ensure continuous telephone
services:
● You can configure the G450 to use up to four MGCs. If the MGC is an S8710, S8720, or
S8730, the first server on the list will normally be the primary C-LAN board connected to
the S8xxx server. If the MGC is an S8400 or S8500, the first server on the list will be either
the primary C-LAN board connected to the S8xxx server or an Ethernet port on the server
that has been enabled for processor Ethernet connections. If the MGC is an S8300, the
first server on the list will be the IP address of the S8300. The remaining servers will be
alternate C-LAN boards connected to the S8xxx server (S8400, S8500, or S8700-series
servers), an S8300 configured as an LSP, or the port enabled as the Ethernet processor
port on an S8500 configured as an LSP.
● To maximize the capacity of a G450, you can configure an external Avaya S8500 Server
installed on the local site as the primary MGC.
● Using the connection preserving migration feature, you can configure the G450 to
preserve the bearer paths of stable calls in the event that the G450 migrates to another
MGC (including an LSP), including migration back from an LSP to the primary MGC. A call
for which the talk path between parties in the call has been established is considered
stable. A call consisting of a user listening to announcements or music is not considered
stable and is not preserved. Any change of state in the call prevents the call from being
preserved. For example, putting a call on hold during MGC migration will cause the call to
be dropped. Special features, such as conference and transfer, are not available on
preserved calls. Connection preserving migration preserves all types of bearer connects
except BRI. PRI trunk connections are preserved.
● You can configure Standard Local Survivability (SLS) to enable a local G450 to provide a
degree of MGC functionality when no link is available to an external MGC. SLS is
configured from the individual G450 itself using the CLI. SLS is supported for all analog
interfaces, ISDN BRI/PRI trunk interfaces, non-ISDN digital DS1 trunk interfaces (T1
Robbed Bit and E1-CAS), IP phones, IP softphones, and DCP phones.
● You can configure Enhanced Local Survivability (ELS) by installing an S8300 in the G450
as a Local Survivable Processor (LSP). In this configuration, the S8300 is not the primary
MGC but takes over to provide continuous telephone service if all external MGCs become
unavailable. Calls in progress continue without interruption when the S8300 takes over.
● You can configure the dialer interface to connect to the G450’s primary MGC via a serial
modem in the event that the connection between the G450 and the MGC is lost.