Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Patent
1997-10-28
2000-02-01
Chan, Wing F.
Telephonic communications
Telephone line or system combined with diverse electrical...
Having transmission of a digital message signal over a...
37910017, H04M 1100
Patent
active
060211830
ABSTRACT:
According to a this invention, a line is acquired in response to reception from the line. An ANSam signal of a V. 8 procedure is sent out to the line in response to acquisition of the line. When a CM signal is received within a predetermined period of time after the start of sending out of the ANSam signal, the V. 8 procedure sequence is continued. When the CM signal is not received within the predetermined period of time, sending of the ANSam signal is stopped, and the sequence is shifted to a sequence using another communication procedure (T. 30 procedure) different from the V. 8 procedure. The predetermined period of time for monitoring reception of the CM signal while sending out the ANSam signal is changed in accordance with the execution state of the communication sequence. Upon automatic reception, the V. 8 procedure can be appropriately executed, and a shift in sequence from the V. 8 procedure to another communication procedure (e.g., T. 30 procedure) can be performed within a short time period.
REFERENCES:
patent: 5721731 (1998-02-01), Yoshida
Canon Kabushiki Kaisha
Chan Wing F.
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