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All MODEMs need special configuration, depending on how the MODEM is to be used
and how the DVST will interact with it.

Standard MODSTR set ups configure the MINIT and SREG strings, the USER string is
left free for any extra configuration that may be needed.

Set type of modem: FAST or SYNC
(default, FAST)

This setting (shortened form of MODem STRings) automatically sets
up the DVST to operate with one of the three recommended
MODEMs.

This sets the MINIT and SREG strings for correct synchronous
operation with the MOTOROLA 326x VFAST MODEM. The MODEM
configuration strings are set up as follows:

MINIT=AT&M1 &D2 &C1 *FLO *AA1 *DTO *OC1
SREG=ATS10=30S25=0

This sets the MINIT and SREG strings for correct synchronous
operation with the MICROCOM 4232bis MODEM. The MODEM
configuration strings are set up as follows:

MINIT=AT&M1 &D2 \GO \EO E1 &C1 \JO
SREG=ATSO=1

Set type of modem: FAST, SYNC, ASYNC or ZYXEL
(default, )ASYNC

This sets the MINIT and SREG strings for correct synchronous
operation with the MOTOROLA 326x VFAST MODEM. The MODEM
configuration strings are set up as follows:

M2INIT=AT&M1 &D2 &C1 *FLO *AA1 *DTO *OC1
SREG2=ATS10=30S25=0

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Page 19

DVST Installation Guide

Modems