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.