Sip-Mode Operations; Overview Of Sip Mode On The Nbx Platform; Sip Mode Operations - 3Com 3C10402B Administrator's Manual

10
Overview of SIP
Mode on the NBX
Platform

SIP Mode Operations

SIP-M
ODE
NBX systems that use Session Initiation Protocol (SIP) are described in
these topics:

Overview of SIP Mode on the NBX Platform

■
Other Applications Support
■
Enabling and Configuring SIP Mode
■
Adding Telephone Users and Devices
■
For more information about these topics and configuration procedures,
see the online Help.
A system running release R6.0 or higher can operate using two forms of
Call Control /Setup.
3Com call control mode — The traditional call control employed by
■
all previous releases of the system software.
SIP mode — 3Com telephones and line cards communicate with the
■
system using 3Com call control mode. SIP devices, such as the 3Com
3108 Wireless Telephone, generic SIP phones, and SIP gateways and
servers, use IETF RFC 3261 (SIP: Session Initiation Protocol) to
communicate with the system.
When you configure a system to run in SIP mode, all audio is carried
using RFC 1889 (RTP: A Transport Protocol for Real-Time Applications) as
the underlying communications infrastructure. Some older devices do not
support RTP and are disabled when you enable SIP mode operations. For
more information about supported devices in SIP mode, see
Support Details" on
A SIP mode system has these operating characteristics, limitations, and
features that differ from a 3Com call control mode system:
O
PERATIONS
page 234.
"Device