When a collect ced digits or collect cdpd digits step is processed, Communication Manager retrieves the ced or cdpd and places the digits in the collected digits buffer. Any digits that were previously in the collected digits buffer, such as dial-ahead digits, are erased. If a TTR was connected to the call from a previous collect digits step, the TTR is disconnected.

Valid digits are 0 through 9, *, and #. If the ced or cdpd contain invalid digits, Communication Manager does not store the UEC IE. When the collect digits step is reached, the collected digits buffer is still cleared and if a TTR is attached, it is still disconnected. A vector event is generated to indicate that no digits were collected.

If no ced or cdpd are received from the network when a collect digits step is processed, the step is not processed. However, the collected digits buffer is still cleared and if a TTR is attached, it is still disconnected.