Multi-Tech Systems BA-Series - Manual (Page 70)

70
MultiModemBA User Guide
Switch #10
Leased Line/Dial-Up Operation -- "DDD"
(Asynchronous/Synchronous Mode/Leased Line/Dial-Up)
The modem operates in either leased-line or dial-up modes. This switch controls leased-line/dial-up
operation. Place DIP-Switch #10 in the UP position for Dial-Up operation. Place DIP-Switch #10 in
the DOWN position for Leased-Line operation
Dial-Up Operation = Switch #10 UP
Leased Line Operation = Switch #10 DOWN
Factory Default Setting = UP
Switch #11
"AT" Responses/Multi-Tech Responses
(Asynchronous Mode/Leased line/Dial-Up)
In Asynchronous mode, you can set the modem to respond with Result Codes according to the
"Multi-Tech" command response set (Switch #11 in the DOWN position), or to "AT" command
response set (Switch #11 in the UP position). The
&Q command performs the same function
(choosing AT or Multi-Tech Result Codes), and is explained further in Section 5.3 of this manual.
"AT" Responses (&Q1) = Switch #11 UP
"Multi-Tech" Responses (&Q0 = Switch #11 DOWN
Factory Default Setting = DOWN
Switch #11
Internal/External Clocking
(Synchronous Mode/Leased Line/Dial-Up)
In Synchronous mode, the transmit clock can be supplied by the DTE on pin 24 of the RS-232C/V.24
interface by placing DIP-Switch #11 UP. Place DIP-Switch #11 in the DOWN position to enable DCE
to control clocking (internal clock via pins 15 and 17 of the RS-232/V.24 interface).
External Clock (pin 24) = Switch #11 UP
Internal Clock (pins 15/17) = Switch #11 DOWN
Factory Default Setting = DOWN
Switch #12
Asynchronous/Synchronous Operation -- "Sync"
(Asynchronous/Synchronous Mode/Leased Line/Dial-Up)
The modem can operate in either Asynchronous mode or Synchronous mode. In Synchronous mode,
start and stop bits are eliminated. The modem's internal clock circuits on the RS-232C/V.24 pins 15
and 17 are activated. The modem's Command mode is not accessible in Synchronous mode. This
switch is a means to alternate and to access either mode. In Synchronous mode, you may want to
set the RTS forcing and CTS forcing DIP-Switches so that both of signals act normally (not forced
on).
Synchronous Operation = Switch #12 UP
Asynchronous Operation = Switch #12 DOWN
Factory Default Setting = DOWN