Chapter 6: Standard Local Survivability
(SLS)
Standard Local Survivability (SLS)
Standard Local Survivability (SLS) provides a local Branch Gateway with a limited subset of
MGC functionality when there is no IP-routed WAN link available to an MGC, or no MGC is
available.
SLS is supported on IPv4 only.
SLS is not a replacement for ELS or SRS (Survivable Remote Server) survivability, which offer
full call-feature functionality and full translations in the survivable mode. Instead, SLS is a cost-
effective survivability alternative offering limited call processing in survivable mode. Although
the Branch Gateway can host an S8300 Server in ICC or SRS mode, SLS offers both local
survivability and call control.
In contrast to the server-based survivability features, SLS operates entirely from the Branch
Gateway and requires a data set comprised of Avaya Aura
®
Communication Manager
translations (survivable ARS analysis and configuration data). This data set is compiled and
distributed to a group of devices using the Provisioning and Installation Manager (PIM). In the
absence of the PIM, the data set can be configured manually from individual Branch Gateways
using CLI commands. For instructions on configuring SLS, see
SLS configuration rules on
page 120.
Related topics:
Media module compatibility with SLS on page 102
SLS features on page 102
Avaya telephones supported in SLS on page 103
Call processing functionality in SLS mode on page 104
Call processing functionality not supported by SLS on page 105
Provisioning data on page 106
PIM configuration data on page 107
SLS entry on page 107
SLS interaction with specific Branch Gateway features on page 109
SLS logging activities on page 117
SLS configuration on page 118
Administering Avaya G430 Branch Gateway October 2013 101
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