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CHAPTER 2: PRODUCT OVERVIEW
One of the following two optional enhancements:
— RS-366 Automatic Calling Unit (ACU) interface.
— Second asynchronous EIA-232D interface. (Two D-channel packet data calls — or one D-
channel packet call and one B-channel circuit call — can operate simultaneously. Two B-
channel circuit switched calls, however, cannot operate simultaneously.)
Asynchronous DTE (Modem Pooling) Features
EIA-232D interface.
Packet or circuit switched data communications.
Data rates of up to 19.2 kilobits per second (kbps).
Asynchronous full-duplex operation.
Automatic answering of incoming data calls.
Data options set via the analog-side data terminal keyboard on a call by call basis.
5ESS® switch modem pooling feature support.
Synchronous DCE Features
The synchronous DCE features with the Multipurpose Enhancement Board are as follows:
EIA-232D interface.
Circuit switched or nailed-up data communication.
Data rates of 1.2, 2.4, 4.8, 9.6, 19.2, 56 or 64 kilobits per second (kbps).
Full-duplex operation at all the above speeds.
Synchronous half-duplex emulation at 1.2 to 56 kbps.
Automatic answering of incoming data calls.
RS-366 Automatic Calling Unit (ACU) interface.
Autodial.
The synchronous DCE features with the High Speed Synchronous Enhancement Board are as
follows:
V.35 interface.
Circuit switched or nailed-up data communication.
Data rates of 48, 56 or 64 kilobits per second (kbps).
Full-duplex operation at all the above speeds.
Synchronous half-duplex emulation at 56 kbps only.
Automatic answering of incoming data calls.
Autodial.
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