SIP endpoints manufactured by Selta will not respond to SIP requests larger than 2000 bytes. To reduce the size of requests sent to Selta endpoints, the Selta endpoint adapter (SeltaEndpointAdapter) performs the same routing header reduction as the RoutingHeadersAdapter, while also removing additional SIP headers (Endpoint-View, User-Agent, P-Conference, Accept-Contact, and History-Info) not required by the Selta endpoint.