Oceanic®

Busies

These outcomes are one of a number of telco messages, in this case indicating that activity is taking place on the number dialed, and the call cannot be connected. Oceanic® isolates busies from all other telco messages, and treats them as a separate class of call outcome.

Fig. 1 - Call outcome percentages and ring times

Fig. 2 - Call outcome detection times

ISDN services will provide an event code that should allow a dialer to immediately recognize busies and terminate the call in milliseconds only, in which case no detection time is required (hence no input controls - Fig. 1).

If the PSTN returns a tone instead, then a dialer may need up to several hundred milliseconds for detection.

If the call is being put through to the agent (Fig. 2), then detection time is likely to be around a second.