User Guide

BSGX4e Business Gateway User Guide 265
Release 01.01 NN47928-102
SIP Configuration
 Monitors the registration status of the SIP endpoints on its LAN and times out the
endpoint entry if the device becomes unregistered. The SIP registration
information is kept in nonvolatile storage, so it can be immediately restored at
restart.
 Manages the Access List Control (ACL) rules. Registration and call requests are
accepted or rejected as directed by ACL rules. See “Access Control List (ACL)”
(page 232).
 Rejects call requests if the internal endpoint is not registered.
 Rejects call requests if the WAN bandwidth required for the call is not available.
See “Call Admission Control (CAC)” (page 236).
 Monitors voice quality. See “Voice Quality Monitoring (VQM)” (page 247).
The SIP session controller supports the following features:
 Call server failover: if the current SIP call server becomes unavailable, the
session controller can switch service to an alternative call server.
 Local call routing: when VoIP service is unavailable, the SIP session controller still
routes local calls within the LAN. It can also, optionally, route external calls to
the PSTN network. See “Local Call Routing” (page 255).
SIP Gateway
The FXS port of the BSGX4e device can provide VoIP communication capabilities for
an analog device. To do so, you must configure the integrated SIP gateway (also
known as the SIP user agent). The SIP gateway interfaces VoIP to plain old telephone
service (POTS) and connects an analog device (phone, modem, or fax machine) to
the SIP network.
SIP Gateway Features
The SIP gateway supports the following features:
 Local dial plan and number analysis
 Do-not-disturb
 Forward-all
 Forward-on-busy
 Forward-no-answer
 Third-party call control
SIP Configuration Steps
The SIP configuration steps are:
1.Configure access to one or more SIP call servers.
2.Configure the SIP session controller.
3.Configure SIP telephones, including the SIP gateway.