7 specifications, 1 async data channel, 2 sync data channel – Multi-Tech Systems DataTalker DT101/xx User Manual
Page 16: 3 system control (command port), 4 composite link, Specifications, Async data channel, Sync data channel, System control (command port), Composite link

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DataTalker Owner’s Manual
1.7 Specifications
1.7.1
Async Data Channel
Number of Channels
One
Maximum Speed
115,200 bps
Channel Speed
All standard speeds from 300 bps to 115,200 bps
Data Format
5, 6, 7, or 8 data bits, with 1, 1.5, or 2 stop bits
Parity
Odd, even, or none
Local Echo
On or off selectable
Flow Control
XON/XOFF, CTS, or HP ENQ/ACK selectable
Pacing
On or off selectable, RTS on/off, or XON/XOFF
Interface
RS-232D/ITU-T V.24; DB-25 female connector
1.7.2
Sync Data Channel
Data Format
Synchronous
Channel Speed
Up to 128K bps
Protocol
SDLC/HDLC
Error Correction
16-bit CRC block check with ARQ
Interface
RS-232D/ITU-T V.24; DB-25 female connector
1.7.3
System Control (Command Port)
Local Access
Through DataTalker’s RS232C command port
Device
Any asynchronous keyboard terminal or PC in terminal mode (local
access only)
Menus
Menus to configure data channel, voice/fax channel(s), and
composite link. Statistics menu and test menus are provided to
monitor performance and diagnose problems.
Diagnostics
Data or voice loopback, memory, watch dog tests, and DIP switch
definitions and settings
1.7.4
Composite Link
Number of Links
One
Data Format
Synchronous
Link Speeds
Up to 256K bps
Link Protocol
Proprietary modified HDLC
Error Correction
16-bit CRC block check with ARQ
Interface
RS-232D/V.24 or ITU-T V.35, or use DataTalker integral modem,
DSU, or ISDN terminal adapter