Direct Routing will reject SIP requests that have Replaces headers defined. SIPS URI should not be used with Direct Routing because it's not supported.Ĭheck your Session Border Controller configuration and make sure that you are not using "Replaces" headers in SIP requests. If the sign is present in a SIP URI, the user field MUST NOT be empty. As per RFC 3261, section 19.1.1, the userinfo part of a URI is optional and MAY be absent when the destination host doesn't have a notion of users or when the host itself is the resource being identified. The SIP headers do not contain userinfo in the SIP URI in use.
The SIP headers in an OPTIONS messages to SIP Proxy are provided as an example: Parameter name It's important for OPTIONS negotiation to be successful (200OK response), allowing for further communication between SBC and SIP Proxy for establishing calls. These OPTIONS messages allow SIP Proxy to provide the allowed capabilities to SBC. Processing the incoming request: finding the tenant and userīefore an incoming or outbound call can be processed, OPTIONS messages are exchanged between SIP Proxy and the SBC. This article is intended for voice administrators who are responsible for configuring the connection between the on-premises SBC and the SIP proxy service.
To route traffic between a Session Border Controller (SBC) and the SIP proxy, some SIP parameters must have specific values. This article describes how Direct Routing implements the Session Initiation Protocol (SIP).
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