Specifications

System Hardware
INTER-TEL
®
CS-5200/5400 ADMINISTRATOR GUIDE, ISSUE 1.0 – April 2005
Power Supplies
Page 69
Power Supplies
Each SIP and IP device must use a compatible power supply. Because there are so many power
supply options, it is recommended that you refer to the IP Devices Power Supply Compatibility
Matrix (part no. 835.2688) when selecting a power supply for the IP or SIP device.
IP Limitations
Currently, SIP and IP devices have the following limitations:
• They do not have a secondary voice path and cannot support off-hook voice announce
(OHVA).
• They do not support the enhanced speakerphone mode feature.
• They cannot use a PCDPM or MDPM.
• They do not support full DSS/BLF units.
• They do not support Desktop Open Architecture Interface (OAI) applications.
• While using P2P audio, SIP and IP devices do not support the Agent Help, Record-A-
Call, and Station Monitor features.
Peer-to-Peer Audio for IP and SIP Devices
The P2P audio feature allows certain IP and SIP devices to transmit and receive audio directly
with each other rather than through the system chassis. The P2P feature reduces delay and
packet loss for IP and SIP devices.
Devices that support P2P audio include:
• AudioCodes™ MP-104 MGCP gateway
• IP endpoints, except the IP SoftPhone
• Multi-Protocol endpoints
• SIP endpoints
To use P2P, the IP Resource Application and the IP and/or SIP devices must be upgraded with
v8.1 firmware. In addition, the devices must be programmed as members of the same Network
Group. Calls between IP and SIP devices that are members of separate Network Groups are
routed through the chassis and do not use P2P.
The Network Group Diagnostics feature allows an administrator to verify that the Network
Groups are programmed correctly. For instructions on how to use the Network Group Diagnos-
tics feature, refer to page 40.
IP devices that use P2P audio do not use chassis resources when they are connected in a P2P
call. Therefore, the following features will not work during a P2P call:
• Agent Help
• Record-A-Call
• Station Monitor
NOTICE
Passing real-time streaming data, such as audio, through encrypted virtual private networks
(VPNs) may significantly impact the network performance, router and firewall functionality,
and audio quality.