Meridian Communications Adapter (Mca); Functional Description - Nortel Meridian 1 Description

Meridian Communications Adapter (MCA)

Functional description

The Meridian Communications Adapter (MCA) replaced the Meridian
Programmable Data Adapter (MPDA) with X11 release 18 and offers
enhanced capability over the MPDA. An MCA can be configured as an
MPDA for use with releases earlier than release 18.
The MCA mounts within the telephone (see Figure 3) and allows
synchronous and asynchronous ASCII terminals, and personal computers to
be connected to the telephone using an RS-232-C or V.35 interface on a
DB-25 connector. With release 14 and later, the MCA allows synchronous
applications (DTEs such as video conferencing equipment and Group IV fax
units) to be connected to the telephone.
Releases 14 through 17 allow access to data functions through the keypad
only. However, release 18 and later allow access to data functions via both
the keypad and service change in LD 11.
Asynchronous mode features supported by the MCA include the following:
• Asynchronous transmission at up to 19.2 kbps (autobaud)
• Enhanced Hayes commands, including upper- and lower-case dialing,
voice call origination through AT dialing, hang-up data call, and on-line
disconnect of voice call
• Script file capability that allows the MCA to learn a dial-up and log on
sequence that can be played back to automatically access a host or
service
• Voice Call Origination (VCO)
• DCE mode
• Autodial
• Ring Again
• Speed Call
• Autobaud and Autoparity Detect
• Modem Pool Calling
• Host/Terminal Mode
Meridian 1 Telephones Description and Specifications
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