The Aricent MTT has the following features

Control Plane
Signaling protocol and session control to setup application level session with the SIP/IP core network.

• Support for in-built call session FSM to handle basic voice calls with intercept to applications at appropriate time for application specific function/override. Interface with network layer to setup session and bearer path for application level signaling.
• Registration, re-registration and de-registration with the SIP/IP core.
• SIP signaling based session control compliant to RFC 3261. This functionality can be used by different applications to setup application specific sessions.
• Support for subscription and notification
• Support for IPV4 as well as IPV6
• Support for subscriptions to any Event Package
• Support for compact format of SIP headers
• Multiple Line on terminal
• Support for INFO
• Support for OPTIONS
• Receiving DTMF digits in RTP as per RFC 2833
• Support for services
1. Call Hold and Call Resume
2. Call Mute and Call Unmute
3. Call Transfer
• Call Transfer Attended
• Call Transfer Unattended
• Semi Attended Call Transfer
4. REFER from Network
5. 3-Way Conference (local merge)
6. N-way Conference (external merge)
7. Call Forwarding
   • Call Forward Unconditional
   • Call Forward Busy Line
   • Call Forward No Response
8. Call Waiting
• Support for Out-of-dialog NOTIFY
• Support for T.38 and clear channel FAX
• TLS Support for SIP messages.
• Support for asynchronous DNS query (AA, SRV) for SIP messages
• Support for multiple streams in call
• Application can specify media preferences per call and per application
• Application can change media codec, codec parameters and mode during call
• NAT Traversal of SIP signalling and media using rport and STUN

• Creation of media stream using RTP as media transport protocol
• Audio/Video Codecs
• Media Management Functions (Adaptive Jitter Buffer, VAD, CNG, Silence Suppression, Packet Loss Concealment, as required)

• Configuration of user ids, proxy address, registrar address, service activation/subscription,
• Configuration of scalability parameters like number of calls, number of lines, number of users etc.