---
title: "Patches SIP configuration for resource."
method: PATCH
path: "/sip"
tags: ["SipConfiguration"]
---

# Patches SIP configuration for resource.

`PATCH /sip`

## Query parameters

- `api-version` string, required

## Response `200`

Patched configuration is returned.

- SipConfiguration — Represents a SIP configuration. When a call is being routed the routes are applied in the same order as in the routes list. A route is matched by its number pattern. Call is then directed into route's first available trunk, based on the order in the route's trunks list.
  - `domains` object — Validated Domains. Map key is domain.
  - `trunks` object — SIP trunks for routing calls. Map key is trunk's FQDN (1-249 characters).
  - `routes` TrunkRoute[] — Trunk routes for routing calls.
    - `description` string — Gets or sets description of the route.
    - `name` string, required — Gets or sets name of the route.
    - `numberPattern` string, required — Gets or sets regex number pattern for routing calls. .NET regex format is supported. The regex should match only digits with an optional '+' prefix without spaces. I.e. "^\+[1-9][0-9]{3,23}$".
    - `trunks` string[] — Gets or sets list of SIP trunks for routing calls. Trunks are represented as FQDN.

## Other responses

- `default` — Failure

## Changes

- **2026-07-13** (2021-05-01-preview) `9fed767fe9fb` — 1 info
  - api operation id `SipRouting_Patch` removed and replaced with `SipRouting_Update`
- **2026-07-13** (2021-05-01-preview) `8423f7f5df67` — 4 info
  - api operation id `PatchSipConfiguration` removed and replaced with `SipRouting_Patch`
  - removed the non-success response with the status `415`
  - removed the non-success response with the status `422`
  - removed the non-success response with the status `500`

[Change history](https://skmtc.dev/azure/apis/communication-siprouting/changes/sip/patch.md)

---

[API](https://skmtc.dev/azure/apis/communication-siprouting.md) · [All operations](https://skmtc.dev/azure/apis/communication-siprouting/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/azure/communication-siprouting/revisions/ef10c25dfcfb/schema)