Dial-Ahead Digits

vector or of terminating the phone call. If the caller selects the former option (by entering 9), the call is routed to the first vector, and the entire process is repeated.

Note the third vector is similar in design to the second vector. The major difference is the information provided and the requested digit entries.

In our example, we have just seen that the caller has to go through at least two sets of options to get the information he or she wants. Each option set is introduced by an announcement. However, because of the “dial-ahead” digit capability, the caller can bypass the announcements if he or she so chooses. Thus, in our example, the caller could enter 1 and 5 within a matter of seconds to hear yesterday’s Southern Division scores.

The caller may enter digits while he or she is being queued for an announcement or while the announcement is playing. If digits are entered during an announcement, the announcement is disconnected or removed from the queue.

Collection of dial-ahead digits continues until one of the following occurs:

Vector processing stops or is terminated.

Sum of the digits collected for the current collect digits command plus the dial-ahead digits exceeds the switch storage limit of 24. Any additional digits are discarded until storage is freed up by a subsequent collect digits command.

NOTE:

Any asterisk (*) and pound sign (#) digits dialed ahead count toward the 24 digit limit, as do any dial-ahead digits entered after the asterisk or pound sign digit.

The TTR required by the user to collect digits has been disconnected. This happens whenever one of the following conditions is true:

Successful or unsuccessful route-to number step is encountered during vector processing, except where the number routed to is a VDN extension.

Successful or unsuccessful route-to digits step is encountered during vector processing, except where the number routed to is a VDN extension.

Successful or unsuccessful adjunct routing step is encountered during vector processing.

Successful or unsuccessful converse-onstep is encountered during vector processing.

Call P rompting timeout occurs, during which time the caller has not dialed any additional digits, asterisks (*) or pound signs (#).

Vector processing stops or is terminated.

Issue 4 September 1995 5-17

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AT&T 555-230-520 manual