KB102 - Different Types of Call Forwarding

Clearfly currently supports two types of forwarding: unconditional and unavailable. An in-depth discussion about unavailable call forwarding can be found in KB108.

What do you mean by call forwarding?

Call forwarding, not to be confused with call transfer, means redirecting a call to an alternate phone number based on specific rules which evaluate current conditions.

What are the different types of call forwarding that Clearfly supports?

Unconditional Call Forwarding
  • Forward immediately regardless of current state of line/<abbr title="Private Branch eXchange">PBX</abbr>.

  • Must be manually enabled/disabled.

  • Behavior

    • SIP/PRI/RBS-T1 to PBX

      • Forwards all Telephone Numbers to a single forward number.

    • Hosted

      • Enabled per line. Each hosted number can forward to a different number.

      • Can be controlled through CommPortal as "Forward All Calls"

    • Analog FXS

      • Enabled per line. Each line can forward to a different number.

Unavailable Call Forwarding
  • Preconfigured number to which calls are forwarded if the customer endpoint becomes unresponsive due to an Internet outage or software/configuration failure of endpoint.

    • Automatically enabled once the customer endpoint stops responding to SIP OPTIONS messages.

    • Automatically removed once the customer endpoint starts responding to SIP OPTIONS messages.

    • Also takes takes effect if the endpoint responds with a error message.

  • Behavior

    • SIP/PRI/RBS-T1 to PBX

      • Configure one unavailable forward number to which all calls are forwarded during the outage/error condition.

        • Individual DIDs can have their own unavailable forward number which overrides the main unavailable forward.

    • Hosted

      • One unavailable forward number configured per extension.

    • Analog FXS

      • One unavailable forward number configured per line.

      • Unavailable forward is not supported on analog lines that are members of a hunt group