AT&T 555-230-520 manual

DEFINITY Switch Data Collection

If VRU data is returned, the calling party is able to touch-tone a response to a DEFINITY prompt only after the data collection phase is completed and another collect digits step is executed. This is true because each executed collect digits step does not allocate a TTR when dial-ahead digits are present. Since VRU- returned digits are treated as dial-ahead digits, a TTR is attached to the call only after all returned digits are collected and another collect digits step is encountered. Only at this point can the caller hear an announcement for the collect digits command and successfully enter digits.

Issue 4 September 1995 H-11