Technical data

• Call Transfer without consultation call (also known as Blind Transfer, Call Deflection, or Single Step Call

Transfer in active state).

• Explicit Call Transfer with consultation call with primary call on hold.

• Explicit Call Transfer with consultation call with primary call not on hold.

TAPI support

• Line Interconnect

• Conferencing

VoIP Call Control

• Session Initiation Protocol (SIP) according to RFC 3261

• Further SIP Methods: NOTIFY (RFC 3265), REFER (RFC 3515), SUBSCRIBE (RFC 3265), REGISTER (RFC

3261) with Digest Authentication, OPTIONS (RFC 3261)

• Session Description Protocol (SDP) according to RFC 2327

• SIP side Call Transfer (known as ECT) as transfer target (C-party) and as call initiator (A-party).

• Support of the SIP Register feature including HTTP Digest Authentication. This scheme is using a simple

challenge/response mechanism and a shared secret between the two servers.

• SIP Diversion Header (according draft-levy-sip-diversion-06.txt)

• Proxy Authentication 407, Invite Authentication

• Proxy and Registrar address can be configured differently. REGISTER request can be sent to Registrar and

INVITE to Proxy.

• SIP Signaling Proxy support if a Registrar is behind a Proxy

• Support of the SIP side Explicit Call Transfer

• Allow to have the port numbers (SIP and Media) configurable (also as a range of port numbers).

For more information about Proxy and Registrar configuration, see the Dialogic

Diva

softIP Online Help file.

Fax services

• T.38* for real-time fax over IP

• T.30* Fax Group 3 using T.38, up to 33.6 kbps (SuperG3 Fax).

Note: The availability of the line speed depends also on the gateway or the remote IP Fax terminal.