DataPhone


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DataPhone

An AT&T trade name for various equipment and services. See DDS.
References in periodicals archive ?
The M4 DataPhone service can also handle voice, fax, e-mail, audio, video and internet connection.
The first modems to use Comsphere are leased-line models that can be programmed with any of the three diagnostic protocols used by AT&T Paradynes's Analysis, Dataphone II, and Comsphere 6800 Series network management systems.
Here, Pru-Bache keeps T1s, M24-compatible muxes, Dataphone 2 modems connecting to the front end, and other equipment.
Previously, AT&T customers with high-volume communications traffic had to choose between a full T1 link or a 56-kb/s Dataphone Digital Service (DDS) link.
There also are a series of 56-kb/s DDS (Dataphone Digital Service) lines in the network and a few 9.6-kb/s analog lines.
Dial-up V.32 modems cost you less than an analog leased line or DDS (AT&T's Dataphone Digital Service Network) 9.6kb/s data line.
AT&T Information Systems' family of Dataphone II products includes a 9.6-kb/s modem that offers multiplexing capabilities and advanced diagnostics.
Hewlett-Packard has also enhanced the HP 4925A bit-error-rate test set to handle Dataphone Digital Service circuits that employ V.35 interfaces.
Dataphone II Level IV, the most advanced product in the Dataphone line, has the ability to manage and control larger, more complex data networks than any similar system, according to AT&T.
One of AT&T's first moves in entering the international data transmission services arena was to link its Dataphone Digital Service with similar service offered in Canada by the Trans-Canada Telephone System.
The bandwidth of the T1 is often less expensive, per bit, than multiple analog lines or DDS (Dataphone Digital Service) circuits of the same aggregate capacity.
During 1974, AT&T initiated its Dataphone Digital Service (DDS), establishing the first nationwide, end-to-end, private-line digital data service.