Specify line configuration

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Enter the following optional information.


Parameter

Description
PBX Line usage Specifies which types of incoming calls are accepted on this line. This allows you to allocate one or more lines to the PBX for specific purposes, for example to ensure that a certain number of lines are always available for calls to the switchboard operator or for Direct Inward Dial. Values:
  • Listed Direct Number only
    The line can be used only for calls to the switchboard operator.
  • Direct Inward Dial only
    The line can be used only for calls using Direct Inward Dial.
  • Direct Inward System Access only
    The line can be used only for calls using Direct Inward System Access.
  • Listed Direct Number or Direct Inward Dial
    The line can be used either for calls to the switchboard operator or for calls using Direct Inward Dial.
Line usage Specifies whether the subscriber intends to use this line for voice, fax and/or modem calls, or exclusively for fax and modem. This controls the use of data encoding and compression on the line. Note that support for T.38 fax encoding depends on the Remote Media Gateway Model being used, and on the T.38 support setting in the Call Agent. This field appears only if Number status is set to Normal, Ported to, or Non-geographic. Values:
  • Voice and fax
    Use this setting if the line can be used for voice calls. The line normally uses 32kbps ADPCM compression (G.726), which is appropriate for voice lines. On detecting a fax tone, it switches automatically to T.38 fax encoding if this is supported, or to uncompressed 64kbps PCM (G.711) otherwise; on detecting a modem tone, it switches to G.711.
  • Fax only
    Use this setting only if the line is used exclusively for fax or modem calls. The line uses uncompressed 64kbps PCM (G.711), but switches to T.38 fax encoding for fax calls if this is supported. Note that G.711 does not provide echo suppression, so there may be problems with echo if the line is used for voice calls.
Signal function code The subscriber's signal function code which is used for CAS signaling. This field appears only if Call Agent signaling type is set to Analog line/T1 CAS and Number status is set to Normal, Ported to, or Non-geographic. Values:
  • Loop start
  • Ground start
  • E and M wink start
  • E and M wink start (Originating), delay start (Terminating)
  • E and M wink start (Originating only)
  • E and M immediate start (Originating only)
  • E and M wink start (Terminating only)
  • E and M delay start (Terminating only)
  • LRB wink start
    The abbreviation LRB indicates Loop Reverse Battery.
  • LRB wink start (Originating only)
  • LRB wink start (Terminating only)
  • Reversed LRB wink start (Originating only)
  • LRB delay start (Terminating only)
  • LRB wink start (Originating), delay start (Terminating)
FSK format The type of FSK tones used to pass Caller ID messages to this subscriber. This field appears only if Call Agent signaling type is set to Analog line/T1 CAS and Number status is set to Normal, Ported to, or Non-geographic, and does not appear if the subscriber uses an access device on a Subscriber Gateway. Values:
  • UK
    Standard UK format
  • Bellcore
    Standard North American format
Line side answer supervision supported Specifies whether Line Side Answer Supervision is supported for this subscriber. This field appears only if Call Agent signaling type is set to Analog line/T1 CAS and Number status is set to Normal, Ported to, or Non-geographic. Values:
  • True
  • False
PBX plays ringback Specifies whether the PBX provides audible ringing tone to the subscriber. Values:
  • True
  • False
PBX plays dialtone Specifies whether or not the PBX provides a dialtone to the susbcriber. Values:
  • True
  • False
ISDN default bearer capabilities This field is valid only in the US.