Systems and methods using secondary signal backchanneling

Details Systems and methods using secondary signal backchanneling Systems and methods using secondary signal backchanneling

2006-10-31

2006-10-31

Chan, Wing (Department: 2614)

Telephonic communications

Plural exchange network or interconnection

Interexchange signalling

C370S352000, C709S200000, C709S227000

Reexamination Certificate

active

07130409

ABSTRACT:
Within a network environment, redundant capabilities for exchanging call-processing signals enhance reliability of telephony support for telephony endpoint devices. A data network, such as a telephony-over-local area network, provides primary support for the telephony endpoint devices, which may be telephony-enabled computers or Internet Protocol telephones. A second network has a first mode in which it is inactive with respect to telephony traffic to the telephony endpoint devices, but has a second mode in which call-processing signals are routed through the second network in response to a determination that the data network is disabled. As a result, telephone features such as call deflection may be continued when the primary support is disabled. In some implementations, the second network includes a third mode in which the voice information is also carried as a response to determining that the data network is disabled and the currently available bandwidth of the second network exceeds a threshold bandwidth level.

REFERENCES:
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patent: 6466573 (2002-10-01), Renucci
patent: 6577622 (2003-06-01), Schuster et al.
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