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Multitech MT224EH7
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: Hayes, V.25bis.
Note
"
The version of the modem has a problem when dialing with V.25bis where if
the number that is dialed is busy, DSR does not drop. This same problem
causes V.25bis error indications to be improperly decoded, meaning that the
modem time-out timer must expire before we know that the attempt failed.
This also means that multiple dialing attempt will always fail. If the DSR
jumper is set so that DSR followsDCD, this problem goes away.
The configuration of the hardware switches on the modem are:
8-position DIP-Switch (S switches):
Switch:
1
2
3
4
5
6
7
8
UP
UP
DOWN
UP
UP
UP
DOWN DOWN
4-position DIP-Switch (X switches):
Switch:
1
2
3
4
DOWN UP
UP DOWN
For Hayes mode to work correctly, AT&RO must be set so that it drops CTS when the
connection goes down. For Hayes, AT$VO must be set. For V.25bis dialing, VT$Vl and AT$BAl
must be set.
Hayes dialing parameters:
BO El Ml QO RO Vl XO &El &E4 &E6 &E8 &El0 &E13 &E15
$MB2400 $SB2400 $BAl &WO
SO
S2
S3
S4
S5
S6
S7
S8
S9
S10 Sll 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 $F1 &GO #LO $MIO &MO
&PO #P2 &QO &Q3 $RO &R1 &Sl $T1 &T4 $VO $VDO &XO YO
$MB2400 $SB2400 $BA1 &WO
OK
A-6
Remote Support Modem Configuration
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