ipTTY is engineered to allow TTY communications using existing telephony infrastructure. The program communicates through IP and uses standard session initiation protocol (SIP).
ipTTY enables virtually every user on your telephony network to communicate with customer’s TTY machines or the Text Relay Service (TRS), without the need for expensive analog lines or FXS gateways.
ipTTY supports audio for hearing and voice carry-over and real-time-text via RFC 4103; the future in real time text communication.
- Can be configured to act like an answering machine.
- Speed Dials for quick calling
- Dial from recent calls list
- Conversations can be saved
- Accessible interface (edit font size and navigate via Tab key)
- Supports Hearing and Voice Carry Over
- Supports Flashers and Wireless Alerters
- Supports Real Time Text (RFC 4103)
The ipTTY application is a voice-over-ip software application. From a PBX or Switch standpoint, the ipTTY is an end point, like a physical or a soft phone might be. A typical softphone is an application which runs on a computer, which controls a headset and microphone to allow audio to pass between the person using the softphone and the remote participant.
The ipTTY application is a unique softphone, in that the audio streams do not pass to/from the user of the softphone, but are kept in the application for the purposes of sending and receiving TTY (baudot) protocol text characters. In essence, ipTTY is a Voice-over IP, TTY machine emulator.
ipTTY works by being configured as a “SIP Endpoint” or “Softphone” on your network. It registers itself to your SIP compatible phone system as an extension. Once ipTTY has been assigned an extension it can receive and place calls just like any other extension. Audio is conveyed between the PSTN (Public Switched Telephone Network) and the ipTTY application through the computer’s network connection.
Technical Information #
These basic steps work on most phone systems.
1. Create a SIP enabled extension on the phone system.
2. Configure a user on the phone system.
3. Install ipTTY on the user’s machine.
4. Configure ipTTY using the credentials from step 2 above.
5. Save ipTTY settings and go!
Ports and Protocols
SIP: 5060 UDP
RTP/RTCP: 8000-8010/UDP; 9000-9010/UDP
Note: Compression should be disabled for all ipTTY extensions. Use only G711.
Any phone system supporting standard SIP