Customizing the call handling behavior

Last Updated : Jan 18, 2023 |

The behavior applied to calls can be customized. This is done on a per-line basis, using the decimal sum of a binary bit string, where bit 0 is least significant bit (right-to-left).

The custom behavior provided by each bit when enabled (set to 1) are:

Bit

Attestation Level

Custom Behavior if bit set to 1

0

Attestation Passed Calls (A and B)

Retain the Caller ID display.

1

Perform directory matching.

2

No Attestation Calls (Assumed A)

Retain the Caller ID display.

3

Perform directory matching.

4

Attestation Failed Calls (C)

Retain the Caller ID display

5

Perform directory matching.

Procedure

  1. Open the SIP line's settings and select SIP Engineering.
  2. Click Add and enter one of the following custom strings:

    • To change the reject code, enter SLIC_STIR_CUSTOM=Z where Z is the decimal sum of the binary bits.

      • For example, SLIC_STIR_CUSTOM=15 retains the caller ID display and does directory matching for all calls expect those that have attestation level C. That is, bits 0 to 3 all set to 1, bits 4 and 5 set to 0. The decimal sum of that bit string is 15.

  3. Click Create new.
  4. Save the settings.
Related information
SIP Calling Number Verification (STIR/SHAKEN)