The IP403 Office can be ordered in four trunk configurations Quad BRI, PRI (T1), PRI (E1) and Analog (loop start). A spare expansion slot is available to add an additional Analog trunk card. Optional internal upgrades allow for support of 2 x V.90 modem calls and a 5, 10 or 20 channel Voice Compression Module (VCM). The VCM module supports 5, 10, or 20 simultaneous voice over IP sessions. These can be used for either providing networking between sites over a wide area network or supporting IP Telephones and Soft phones. An IP extension only uses the compression module whilst on a call to a non-IP extension/line. Hence, it is possible to support more extensions than the capacity of the VCM.

Through the support of up to three external Expansion Modules, the IP Office 403 can be enhanced to support a further 90 analog or digital handsets.

Conferencing Center

The Avaya IP403 Office base unit is a 19” rack mountable voice and data communication system and supports as standard -

IP Office Licenses

• Eight digital handset ports (Digital Terminal and Digital Station options of the IP403 Office base unit are available dependent on territory)
  
• Two Analog telephone ports
  
• Eight 10/100 Mbps LAN Hub ports
  
• USB Port for TPAD compliant point of sale terminals
  
• DTE Port
  
• X.21/V35 WAN interface
  
• Support for 3 Expansion Modules
  
• Two Relay ports for door entry systems (External O/P socket)
  
• Audio Port for external Music on hold source
  
• 18 Data channels**

Soft Console

**Note: A data channel is used whenever a call is made from the IP network to an exchange line (Central Office). For example, four people surfing the Internet will use a single data channel since they all share the same line to the ISP. Two people remotely accessing the Office LAN from home will use two data channels since they have dialed in on separate lines. IP extensions do not use data channels.