Signal transfer arrangement

Details Signal transfer arrangement Signal transfer arrangement

1987-04-16

1988-07-12

Dwyer, James L.

Telephonic communications

Special services

Anonymous party

379212, 379229, 370 62, H04M 706, H04M 342

Patent

active

047575263

ABSTRACT:
A telecommunication system providing centrex services, and having an attendant position serving users from diverse customer locations. Users at a satellite customer location connected to one exchange and employing ISDN terminals are provided with access to an attendant position at a main customer location connected to another exchange. ISDN messages from users at the satellite location requesting attendant services are recognized at the exchange associated with the satellite location and transmitted as analog flash signals via an analog signaling trunk to the exchange to which the attendant is connected. The exchange receiving the flash signals interpret the signals as requests for attendant services and provides the necessary connections to the attendant's position.

REFERENCES:
patent: 3859473 (1975-01-01), Brown et al.
patent: 4596010 (1986-06-01), Beckner et al.
patent: 4602363 (1986-07-01), Das et al.
"Call Transfer Feature Document 1 and 1A ESS.TM. Switches" AT&T Practice, SPCS AT&T 231-090-079 Addendum, Issue 1, Jul., 1985.
Part V, Pages V-16 through V-19, V-65 through V-93 and V-133 through V-135 of ISDN Basic Rate Interface Specification, AT&T, 1985.

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