Restrictions and Caveats
You need to keep several important restrictions in mind when you are applying or developing applications:
- To collect digits over an IP call leg, configure DTMF-Relay.
- RTSP multicast is not supported.
- Tcl IVR 1.0 and Tcl IVR 2.0 are not compatible.
- For VoiceXML, the web server must support HTTP 1.1.
- Load Dynamic VoiceXML documents by using HTTP. Using FTP or TFTP impacts performance.
- VoiceXML does not support ISDN Overlap signaling.
- You cannot apply applications to CallManager-controlled Multiple Gateway Control Point (MGCP) gateways.
- The SRST and CME AA scripts only work on POTS dial peers. They do not support calls from IP phones.