Creating an H.323 trunk signaling group

Last Updated : Jul 12, 2023 |

Procedure

  1. Type add signaling-group number.

    The system displays the Signaling Group screen.

  2. In the Group Type field, type h.323.
  3. Leave the Trunk Group for Channel Selection field blank.

    After you create a trunk group, use the change command. Then type the trunk group number in the Trunk Group for Channel Selection field.

  4. In the T303 Timer field, type the number of seconds that the system waits for a response from the far end before invoking Look Ahead Routing.

    The system displays the T303 Timer field when the Group Type field on the DS1 Circuit Pack screen is isdn-pri. The system also displays the T303 Timer when the Group Type field on the Signaling Group screen is h.323.

  5. In the H.245 DTMF Signal Tone Duration (msec) field, specify the tone duration of DTMF tones sent in an H.245-signal message.

    The system displays the H.245 DTMF Signal Tone Duration (msec) field when the DTMF over IP field on the Signaling Group screen is set to out-of-band. The value of the H.245 DTMF Signal Tone Duration (msec) field can be either in the range 80 ms to 350 ms. The default value is blank.

  6. In the Near-end Node Name field, type the node name for the PROCR IP interface on this switch.

    The node name must be administered on the Node Names screen and the IP Interfaces screen.

  7. In the Far-end Node Name field, type the node name for the far-end PROCR IP Interface used for trunks assigned to this signaling group.

    The node name must be administered on the Node Names screen on this switch.

    Leave the Far-end Node Name field blank when the signaling group is associated with an unspecified destination.

  8. In the Near-end Listen Port field, type an unused port number from the range 1719, 1720, or 5000 to 9999.

    Avaya recommends using port number 1720. If the LRQ field is y, type 1719.

  9. In the Far-end Listen Port field, enter the same number as the one in the Near-end Listen Port field.

    Leave the Far-end Listen Port field blank when the signaling group is associated with an unspecified destination.

  10. In the Far-end Network Region field, enter a value between 1-250.

    Leave the field blank to select the region of the near-end node (PROCR). Identify the network assigned to the far end of the trunk group. The region is used to obtain the codec set used for negotiation of trunk bearer capability. If specified, this region is used for selection of a codec instead of the default region obtained from the PROCR used by the signaling group .

  11. In the LRQ Required field, type n when the far-end switch is an Avaya product and H.235 Annex H Required? is set to n.

    Type y in one of the following situations:

    • The 235 Annex H Required? field is set to y or

    • The far-end switch requires a location request to obtain a signaling address in its signaling protocol.

  12. In the Calls Share IP Signaling Connection field, type y for connections between Avaya equipment.

    Type n when the local or remote switch is not an Avaya switch.

  13. In the RRQ Required field, type y when a vendor registration request is required.
  14. In the Bypass if IP Threshold Exceeded field, type y.

    The system removes trunks assigned to this signaling group from service when IP transport performance falls below limits administered on the Maintenance-Related System Parameters screen.

  15. In the H.235 Annex H Required field, type y.

    The H.235 Annex H Required field indicates whether the Avaya Aura® Communication Manager server requires H.235 amendment 1 with annex H protocol for authentication during registration.

  16. In the DTMF Over IP field, specify the transmission of the DTMF digits.

    The valid options for SIP signaling groups are in-band and rtp-payload.

    The valid options for H.323 signaling groups are in-band, in-band-g711, out-of-band, and rtp-payload.

  17. In the Direct IP-IP Audio Connections field, type y.

    This option optimizes bandwidth resources and improves sound quality of voice over IP (VoIP) transmissions. For SIP Enablement Services (SES) trunk groups, this value helps in direct audio connections between SES endpoints.

  18. In the Link Loss Delay Timer field, specify how long to hold the call state information in the event of an IP network failure or disruption.

    Communication Manager preserves calls and starts this timer at the onset of network disruption or signaling socket failure. If the signaling channel recovers before the timer expires, all call state information is preserved and the signaling channel is recovered. If the signaling channel does not recover before the timer expires, the system:

    • raises an alarm against the signaling channel

    • maintains all connections with the signaling channel

    • discards all call state information about the signaling channel

  19. In the IP Audio Hairpinning field, type y to enable hairpinning for H.323 or SIP trunk groups.

    Using the IP Audio Hairpinning field entry, you have the option for H.323 and SES-enabled endpoints to be connected through the IP circuit pack in the server or switch, without going through the time division multiplexing (TDM) bus.

  20. In the Interworking Message field, select a value that determines what message Communication Manager should send when an incoming ISDN trunk call is routed over a non-ISDN trunk group.

    Normally select the value PROGress, with which the public network can cut through the B-channel. The caller can then hear tones provided over the non-ISDN trunk, such as ringback or busy tone .

    Selecting the value ALERTing causes the public network in many countries to play ringback tone to the caller. Select this value only if the DS1 is connected to the public network, and it is determined that callers hear silence rather than ringback or busy tone when a call incoming over the DS1 is routed to a non-ISDN trunk.

  21. In the DCP/Analog Bearer Capability field, set the information transfer capability in a bearer capability IE of a setup message to speech or 3.1kHz.

    The default value is 3.1kHz. The default value provides 3.1kHz audio encoding in the information transfer capability. Selecting the value of speech provides speech encoding in the information transfer capability.

  22. If using DCS, go to the Administered NCA TSC Assignment page of this screen.

    To enter NCA TSC information on this screen, see Avaya Aura® Communication Manager Screen Reference.

  23. Save the changes.