AT&T System 85 manual External Ringing Tones, Handset Tones

GENERAL INFORMATION

Tones

The tones that a voice terminal user hears can be divided into two categories:

Ringing Tones—those that are generated in the base of the voice terminal and can be heard in the surrounding area; they indicate incoming calls.

Handset Tones—those that are transmitted through the handset and heard only by the user or through the speakerphone when it is turned on.

External Ringing Tones

Ringing tones are the only tones heard outside the voice terminal when it is receiving a call. This signal cycles in 1-, 2-, or 3-ring patterns. On System 75 and DEFINITY G1 and G3, only one cycle of ringing is heard if the multi-appearance voice terminal is busy with another call. On Sys- tem 85 and DEFINITY G2, the cycling repeats (except on the ISDN 7500-series sets).

One ring—a call from another voice terminal in the system

Two rings—a call from the attendant or outside caller

Three rings—priority calls, for example, Automatic Callback, Priority Calling, or Ringback from a queued call

One short unmodulated tone—an intercom call

Ring-Ping (half ring)—a call redirected away from the voice terminal because Send All Calls or Call Forwarding is active; also called coverage tone.

On System 85 and DEFINITY G2, any of these external tones, plus a repeated unmodu- lated tone, may be administered to indicate an intercom call.

Handset Tones

The following tones are heard through the handset:

Answer Tone—a high-pitched continuous tone indicating that a data endpoint has answered.

Busy Tone—a low-pitched tone repeated 60 times a minute; indicates that the number dialed is in use.

Call Waiting Tone (Single-Line Voice Terminals)—one, two, or three beeps (short bursts of high-pitched tone), not repeated; indicates to the user at a busy single-line ter- minal that an incoming call is waiting to be answered. The number of beeps indicates the source of the waiting call:

One beep—a call from another voice terminal in the system

Two fast beeps—a call from the attendant or an outside caller

Three fast beeps—a priority call

2-9