Supported Sip Features - 3Com V7122 User Manual

Supports routing of IP Tel calls to predefined trunk groups.
Supports a configurable channel select mode per trunk group.
Supports various number manipulation rules for IP Tel and Tel IP, called and calling
numbers.
Option to configure ISDN Transfer Capability per trunk.
Supports QSIG messages tunneling over SIP according to <draft-elwell-sipping-qsig-
tunnel-03>.
Supports ISDN PRI Setup and Facility messages tunneling over SIP INVITE and INFO
messages.
Interworking of Redirect Number for QSIG SIP calls.
Supports QSIG Call Re-Route.
Supports QSIG MWI Notifications.

Supported SIP Features

Reliable User Datagram Protocol (UDP) transport, with retransmissions.
Transmission Control Protocol (TCP) Transport layer.
SIPS using TLS.
T.38 real time fax (using SIP).
If the remote side includes the fax maximum rate parameter in the SDP body of
the INVITE message, the gateway returns the same rate in the response SDP.
Works with Proxy or without Proxy, using an internal routing table.
Fallback to internal routing table if Proxy is not responding.
Supports up to four Proxy servers. If the primary Proxy fails, the gateway automatically
switches to a redundant Proxy.
Supports domain name resolving using DNS SRV records for Proxy, Registrar and
domain names that appear in the Contact and Record-Route headers.
Proxy and Registrar Authentication (handling 401 and 407 responses) using Basic or
Digest methods. Accepted challenges are kept for future requests to reduce the network
traffic.
Single gateway Registration or multiple Registration of all gateway endpoints.
Supported methods: INVITE, CANCEL, BYE, ACK, REGISTER, OPTIONS, INFO,
REFER, UPDATE, NOTIFY, PRACK and SUBSCRIBE.
Modifying connection parameters for an already established call (re-INVITE).
Working with a Redirect server and handling 3xx responses.
V7122 Gateway User Guide
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