Programming SIP Trunks

Before You Begin

Ensure you have the following information:

About Programming SIP Trunks

The licensing for SIP trunks is enabled through the SIP Trunks field in the License and Option Selection form. Each SIP Peer has access to the whole pool of licenses (up to 2000), which can be shared between SIP Peer Profiles. The Maximum Simultaneous Calls field provides the upper limit of how many licenses can be used by a particular SIP Peer Profile. You can also reserve some or all of the assigned licenses for a particular peer (see Minimum Reserved Call Licenses field in the SIP Peer Profile form). Once the Maximum Simultaneous Calls is reached, the call is rejected.

Examples of SIP trunk license configurations for a SIP Peer Profile:

NOTES

 

Conditions/Dependencies

Programming

Fill out the forms below in the order listed.

  1. License and Option Selection form

  1. Network Elements form

  2. Create a network element for the local switch

  3. Create a network element for the Outbound Proxy if one exists in your network 

  4. Create a network element for each SIP peer, gateway, or Service Provider

    NOTE: To add a SIP peer, click Add, select Other as the Type, select the SIP Peer check box, and then program the SIP Peer Specific fields.

  1. System IP Ports form

  1. SIP Peer Profile form

  1. SIP Peer Profile Assignment by Incoming DID

  1. Trunk Attributes

Configure at least one of the following (trunk as non-dial in or dial-in) to receive incoming calls:

  1. update the Non-Dial-In Trunks Answer Point field for the incoming calls.

  2. strip the number of leading digits in Dial-In Trunks Incoming Digit Modification Absorb field

  3. add the appropriate number of digits in Dial-In Trunks Incoming Digit Modification Insert field.

  1. ARS Routes

ARS continues to be provisioned in the traditional manner by assigning a route to a digit or digit string. Complete the following fields in this form:

  1. select SIP Trunk from the pull-down list in Routing Medium.

  1. select a SIP Peer Profile label from the SIP Peer Profile pull-down list.

  2. enter a Class of Restriction group number in COR Group Number.

  3. enter any required digits in Digits Before Outpulsing. (If this field is left blank, digits will be sent out as " Enbloc".)

  1. Class of Service Options

Enable the Public Network Access via DPNSS field in the class of service for all devices that make outgoing calls through SIP trunks, PRI trunks, LS trunks, and so forth that are connected to SIP Trunks.

  1. (Optional) Set up Calling Party Number Substitution for outbound calls

NOTE: You can also configure the CPN Substitution Number in the User and Services Configuration form.

  1. (Optional) Set up Inward Dialing Modification for inbound calls:

  2. Add new rules in the Inward Dialing Modification form .

  3. Associate the rules to links in the SIP Peer Profile Called Party Inward Dialing Modification ( ) and SIP Peer Profile Calling Party Inward Dialing Modification ( ) forms

NOTE: You can associate Inward Dialing Modification rules to SIP devices in the SIP Device Capabilities form.

  1. (Optional) To enable external hot desk users (EHDUs) to access mid-call features

Network Elements form

SIP Peer Profile form

  1. (Optional) To implement Call Billing for SIP Gateway

Network Zones form

Class of Service Options form

Associated Directory Numbers form

SIP Peer Profile form

For more information, see the Programming section in Call Billing for SIP Gateway.