Page 5-179
System Features
INTER-TEL
®
AXXESS
®
MANUAL VERSION 11.0 – May 2008
Peer-to-Peer Audio for IP and SIP Devices
FEATURES
5
D. PEER-TO-PEER AUDIO FOR IP AND SIP DEVICES
22.26 The peer-to-peer (P2P) audio feature allows certain Internet Protocol (IP) and multi-
protocol (SIP or ITP) devices to transmit and receive audio directly with each other. With this
feature, the audio is not transmitted or received through the system chassis. This reduces delay
and removes the audio stream from the Time Division Multiplex (TDM) highway.
22.27 Devices that support P2P audio include:
• AudioCodes MP-114 or Quintum AFT 400 SIP gateway
• IP endpoints, except the IP SoftPhone
• SIP endpoints
22.28 To use P2P audio:
• The devices must be members of the same Network Group (see page 6-182).
• The IPRC and IP devices must be upgraded to version 8.1 firmware. (SIP endpoints do
not require firmware upgrades.)
• The devices must terminate on an IPRC with v8.1 firmware.
• There cannot be a NAT or firewall between the communicating devices.
• For SIP endpoints, the latest version of SIP Server (v1.1 or later) must be installed.
NOTE: For details about SIP Server and the associated endpoints, see the latest version of
the SIP Server Installation and Configuration Manual.
22.29 Because the devices are not using chassis resources, devices connected in a P2P call
cannot use the following features:
• Agent Help
• Record-A-Call
• Station Monitor
NOTE: The IP SoftPhone does not support v8.1 or later firmware and cannot use P2P audio.
NOTICE
Passing real-time streaming data, such as audio, through encrypted virtual private networks
(VPNs) may significantly impact network performance, router and firewall functionality, and
audio quality.
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