Caller ID: SIP advanced settings

In general, the caller ID display for outbound calls are controlled by the SIP message sent from Voicent software and/or your SIP phone service. Many services assign caller IDs to your account or SIP trunk. These caller IDs are set regardless of the SIP message (INVITE message) sent from Voicent software. This is especially true now when SHAKEN/STIR is activated by law.

In the cases that your SIP services allow dynamically setting caller ID for outbound calls, you can use the follow 3 options to control the caller ID display. Different services use different method, so experiment with the option to see which one works. The following setting can be accessed from Voicent App, Setup, Option menu. Choose the SIP account, click Edit, then click the Advanced button.

1. Sip service uses P-Asserted-Identity

Select this one if your SIP service uses P-Asserted-Identity. Once set, calls made from Voicent software will have your selected caller ID value set for this field.

2. Sip service uses display name as caller ID
3. Sip service uses SIP ID as caller ID

The FROM field of an SIP INVITE message will be composed differently based on this setting. The standard format for the FROM field is ["display name"] [SIP ID]@[sip domain]. If the SIP ID field is used for caller ID and the caller ID is 16505551212, for example, then the FROM field will be like “John Doe” 16505551212@192.168.1.100.

Again, please note the ultimate control of caller ID display is controlled by your phone service. These settings are used to help your service provider to identify the correct caller Id. It will work only if your service provider support setting caller ID from the sip message.