Small Business Phone Systems

Avaya IP Office

The Avaya IP Office platform is the ultimate in converged voice and data technology. IP Office brings a combination of voice and data applications formerly reserved for only the largest corporations. Cutting edge customer service with easy to use tools is now available to the smallest of businesses.

Service | PPP

Fields in this tab enable you to configure Point to Point Protocol (PPP) in relation to this particular service. PPP is a protocol for communication between two computers using a Serial interface.

Settings

• Chap Challenge Interval (secs): Default = 0 (disabled). Range = 0 to 99999 seconds.
  The period between CHAP challenges. Blank or 0 disables repeated challenges. Some software such as Windows 95 DUN does not support repeated CHAP challenges.

• Header Compression Mode: Default = None selected
  Enables the negotiation and use of IP Header Compression. Supported modes are IPHC and VJ. IPHC should be used on WAN links.

• BACP: Default = Off
  Enables the negotiation and use of BACP/BCP protocols. These are used to control the addition of B channels to increase bandwidth.

• Incoming traffic does not keep link up: Default = On
  When enabled, the link is not kept up for incoming traffic only.

• Multilink/QoS: Default = Off
  Enables the negotiation and use of Multilink protocol (MPPC) on links into this Service. Multilink must be enabled if there is more than one channel that is allowed to be Bundled/Multilinked to this RAS Service.

• Compression Mode: Default = MPPC
  Enables the negotiate and use of compression. Do not use on VoIP WAN links.

• • Disable
    Do not use or attempt to use compression.

  • StacLZS
    Attempt to use STAC compression (Mode 3, sequence check mode).

  • MPPC
    Attempt to use MPPC compression. Useful for NT Servers.

• Callback Mode: Default = Disable

• • Disable
    Callback is not enabled

  • LCP: (Link Control Protocol)
    After authentication the incoming call is dropped and an outgoing call to the number configured in the Service is made to re-establish the link.

  • Callback CP: (Microsoft's Callback Control Protocol)
    After acceptance from both ends the incoming call is dropped and an outgoing call to the number configured in the Service is made to re-establish the link.

  • Extended CBCP: (Extended Callback Control Protocol)
    Similar to Callback CP except the Microsoft application at the remote end prompts for a telephone number. An outgoing call is then made to that number to re-establish the link.

• Access Mode: Default = Digital64
  Sets the protocol, line speed and connection request type used when making outgoing calls. Incoming calls are automatically handled (see RAS services).

• • Digital64
    Protocol set to Sync PPP, rate 64000 bps, call presented to local exchange as a "Data Call".

  • Digital56
    As above but rate 56000 bps.

  • Voice56
    As above but call is presented to local exchange as a "Voice Call".

  • V120
    Protocol set to Async PPP, rate V.120, call presented to local exchange as a "Data Call". This mode runs at up to 64K per channel but has a higher Protocol overhead than pure 64K operation. Used for some bulletin board systems as it allows the destination end to run at a different asynchronous speed to the calling end.

  • V110
    Protocol is set to Async PPP, rate V.110. This runs at 9600 bps, call is presented to local exchange as a "Data Call". It is ideal for some bulletin boards.

  • Modem
    Allows Asynchronous PPP to run over an auto-adapting Modem to a service provider (requires a Modem2 card in the main unit)

• Data Pkt. Size: Default = 0, Range = 0 to 2048.
  Sets the size limit for the Maximum Transmissible Unit.