For V.22bis auto-answer, internal jumper DSR must be set so that DSR follows OH. The
factory default is for DSR to follow CD. This is different from the Support Link where the
factory default was for DSR to follow OH. There does not seem to be an AT command that
does this.
V.25bis dialing parameters:
BO E1 M1 QO RO V1 XO &E1 &E4 &E6 &E8 &E10 &E13 &E15
$MB2400 $SB2400 $BA1 &WO
SO S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S24 S25 S30
001 043 013 010 008 002 030 002 006 007 070 050 020 000 000
$AO &AO&BO&BSl &Cl $DO &D2 #DBO $EBO $Fl &GO#LO $MIO &MO
&PO #P2 &QO&Q3 $RO &Rl &Sl $Tl &T4 $Vl $VDO&XOYO
$MB2400 $SB2400 $BAl &WO
VAL
To modify a MT224E7B:
• Open modem and change the DSR jumper.
• Set switches on the bottom of the box to above.
• Send AT&RO
• For Hayes dialing, send AT$VO.
• For V.25bis dialing, send AT$V1.
HP 372128
Supported modes:
• Bell
• CCITT_OM
• CCITT_AM
• CCITT_BIS_OM
• CCITT_BIS_AM
Supported cables:
• HP 92219Q - Bell, CCITT_OM, CCITT_AM
• A1703-64006 - CCITT_BIS_OM, CCITT_BIS_AM
Auto-dial modes: None
It is best to use this modem in CCITT mode because it causes the Access Port to hang up if
used in Bell mode at 1200 baud. It can be used in Bell mode at 2400 baud, or either 1200 or
2400 in CCITT mode. This modem can not be dialed with either Hayes or V.25BIS auto-dial
protocols. Table A-5 describes the switch settings.
Remote Support Modem Configuration A-7
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