Method for controlling re-dial operation of a facsimile system w

Details Method for controlling re-dial operation of a facsimile system w Method for controlling re-dial operation of a facsimile system w

1991-03-04

1992-06-23

Dwyer, James L.

Telephonic communications

Telephone line or system combined with diverse electrical...

To produce visual-graphic copy

358434, H04M 1100

Patent

active

051250250

ABSTRACT:
A method for controlling re-dialing by a calling facsimile system attempting a non-standard capability facsimile operation with a called facsimile system over the public switched telephone network includes the steps of checking for reception of a non-standard facilities (NSF) command from the called facsimile system regarding a requested non-standard capability service and transmitting information to the calling facsimile system as to whether the requested non-standard capability service is executable by the called facsimile system. Upon determining from the received NSF command information that the requested service is not executable by the called facsimile system, an error flag is set by the calling facsimile system and the connection with the called facsimile system is terminated. Upon subsequent re-trying of facsimile operation by the calling facsimile system, detection of the error flag is performed for thereby preventing any re-dialing of the called facsimile system by the calling facsimile system and thus avoiding additional telephone network connection charges.

REFERENCES:
patent: 4748662 (1988-05-01), Hirata
patent: 4807276 (1989-02-01), Okabe
patent: 4815121 (1989-03-01), Yoshida
patent: 4876609 (1989-12-01), Ogura
patent: 4885755 (1989-12-01), Yoshida
patent: 4887162 (1989-12-01), Arai
patent: 4910506 (1990-03-01), Yoshida et al.

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