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How do I configure the general settings of an Elastic SIP Trunk?

Objective

This article shows you how to change an Elastic SIP Trunk's name and its call-level behaviour — secure trunking, CNAM lookup, symmetric RTP, PRACK, call transfer and call recording.

 

Product

Elastic SIP Trunking

 

Environment

Twilio Console

 

User Account Permission/Role(s) Required

Your role must include permission to read SIP trunks to open the page, and permission to update SIP trunks to save changes.

 

Procedure

  1. In the Twilio Console, select Communications in the left sidebar.
  2. Select Elastic SIP Trunking.
  3. On the SIP trunks tab, select the trunk you want to configure, then open the General tab.
  4. Under Properties, review the read-only Trunk SID (which you can copy) and edit the Friendly name, a descriptive name up to 64 characters.
  5. Under Secure trunking, set:
    1. Secure trunking: Enabled or Disabled. When enabled, TLS encrypts SIP signaling and SRTP encrypts media; non-encrypted calls are rejected.
    2. CNAM lookup: select Enable Caller ID Name (CNAM) lookup.
    3. Symmetric RTP: select Enable symmetric RTP.
    4. PRACK (100rel): select Enable reliable provisional responses (100rel).
    5. Under Call transfer (SIP REFER), set:
    6. Call transfer: Disabled, Enable for all, or SIP only. This controls whether active calls can be transferred via SIP REFER.
    7. Caller ID for transfer target: From transferee or From transferor.
    8. Under Call recording, set:
    9. Recording mode: Do not record, Record from ringing, Record from answer, Dual record from ringing, or Dual record from answer.
    10. Recording trim:  Do not trim or Trim silence.
  6. Select Save changes. A SIP trunk updated. confirmation appears.

 

Additional Information

  • The friendly name is required and limited to 64 characters.
  • Secure trunking applies to both directions of the trunk; there is a single control rather than separate origination and termination settings.
  • Delete trunk on this tab removes the trunk entirely.
  • Select Cancel to leave the page without saving and return to the trunks list.

 

This content was generated by AI and reviewed, edited, and verified by a human.

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