One-X Agent uses (TTS) which is enabled by default, IP Agent does not use such protocol.
Time-to-Service (TTS)
The IP Endpoint Time-to-Service (TTS) feature was introduced in Software Release 1.2, along with Avaya Communication Manager (CM) Release 4.0. TTS changes the way IP endpoints register with their gatekeeper, reducing the time to come into service. Currently, IP endpoints are brought into service in two steps, which are coupled (1) H.323 registration and (2) TCP socket establishment for call signaling. The TTS feature de-couples these steps. In CM 4.0, IP endpoints can be enabled for service with just the registration step. TCP sockets are established later, as needed.
The TTS feature also changes the direction of socket establishment. With TTS, Communication Manager, rather than the endpoint, initiates socket establishment, which further improves performance. In CM 4.0, TTS is enabled by default, but can be disabled for all IP endpoints in a given IP network region by changing the IP Network form. TTS applies only to IP endpoints whose firmware has been updated to support this feature. It does not apply to the following endpoints: third party H.323, DCP, BRI, and analog. For more information, see the Administrator Guide for Avaya Communications Manager (Document Number 03-300509).
