Resource Center

Modem Initialization Strings (Extra Settings)

Listed Alphabetically by Modem manufacturer.

Extra Settings can be added by clicking on

Start > Settings > Control Panel > Modems

Select your modem and click Properties

Select the Connection tab at the top

Click the Advanced button at the bottom right

Add the Extra Setting at the bottom

Click OK, then OK again and retry the connection

NOTE: Many of the initialization strings listed here will disable 56k in an effort to get your modem connected, and keep it from dropping the connection. Those specifically designed to turn on V90 are listed as such. If your modem requires a 56k disable string to get you connected at all, we recommend 2 courses of action. First, visit your modem or PC manufacturer's web page and search for any Driver or Firmware Upgrades. If you already have the latest drivers, or the update was no help, you will need to contact your local telephone carrier regarding Line Noise and Signal Strength.

ActionTec
ActionTec v90
ATs38=0-v90=0

ActionTec FM560LK
S38=0S109=0

ActionTec FM560RK
+MS=11,0

ActionTec FM560SK (x2)
+MS=V34,1,300,33600

Atlas
+MS=X2,1,0,0

AOpen
AOpen FM56 ITU
v 2.081-k56_2m DLP
AT&F+MS=11,0
AT+MS=12,1,34667,56000 (enables v90)

AOpen FM 56-P 56 Data Fax
AT&F+MS=V34
AT+MS=11,0
AT+MS=12,1,34667,56000 (enables v90)

AOpen FM56-H
AT&F+MS=V90 (enables v90)

Best Data
Smart One Fw-vw ISA modem
AT&F+MS=V34
AT&F+MS=12,1,300,56000 (enables v90)

Smart One 56SF Internal V90 Data Fax Modem
AT+MS=12,1,28000,56000 (enables v90)

Cirrus Logic chipset (CL-MD-56XX)
ATZ (kills 629's)
AT&F&K3
AT&F2&C1&D2W2
AT+MS=11,1,9600,33600 (if it's 56Kflex)
AT+MS=V34B,1,300,0 (disables 56k)
AT+MS=X2,1,300,0 (disables 56k)
ATS32=0+MS=VX2,0 (disables 56k)

Creative Labs
Creative Modem Blaster Flash 56k PCI
AT&F+MS+V34

Compaq
Compaq DF modem
add 3 commas after the phone number

Compaq 56k modem
AT&FC1&D2X4W1S7=60S11=60&Q5s46=2&K3S36=7

Compaq CE modem
s51=15

Diamond

Diamond SupraMax 56i modem
If you are using the PCI version of the SupraMax modem, try the following initialization string in your dialing software:
AT&F+MR=1;+MS=V34

If you are using the ISA version of the SupraMax modem, try the following initialization string in your dialing software:
AT&FW2+MS=V34
AT+MS=V90 to try and establish V90

Diamond SupraExpress 56i V.90
+MS=12,0,28000,56000 init string to force V90
+MS=12,1,28000,56000 automatically adjust for line speeds

Diamond support advises AT&F1 W2 for all supra's. Add +MS=11,0 to get connected at v.34
As well, setting it to the Windows 98 Standard 56k Modem Driver will work.

Diamond
Supra Max 56i ISA FAX (2.03)
AT&FW2+MS=V34
Supra Max 56i PCI SP (2.1.2.xxx)
AT&FW2+MS=V34
Supra Max 56i PCI Voice (2.1.2.xxx)
AT&FW2+MS=V34
SupraExpress 56e V.90 Sup 2420 (2.xxx)
AT&FW2+MS=11,0
SupraExpress 56i Sp V.90 Sup 2480 (2.xxx)
AT&FW2+MS=11,0
SupraExpress 56i V.90 Sup 2490 (2.xxx)
AT&FW2+MS=11,0
Supra PC Card (PC) Sup 2240 (2.xxx)
AT&FW2+MS=11,0

Harmony
Harmony k56Flex PC voice modem
v1.120.01-k56_dlp

HSP modems
AT&FN0s37=12 (disables 56k)
AT&F&C1&D2&K3W1 (default init string)

HSPK 56k flex PNP modem
AT&FS38=0 (disables 56Kflex)

Jaton
Jaton Modulator (wincruise modems)
ATS36=7S48=0

LT chipset

For Apollo (LT WinModem) and Mars(LT PCI WinModem) chipsets:
Enable V.90 -V90=1
Disable V.90 -V90=0

Venus chipsets (mostly used in external modems):
K56Flex only (V.90 disabled) S109=0
K56Flex or V.90 S109=1
V.90 only (K56Flex disabled) S109=2

The correct string to get v.34 from a Venus chipset is S109=2S109=0
For Lucent-based K56flex modems that do not also support V.90, add S38=0 to the end of your modem init string.

Examples of sample ATI Responses -
ATI3: LT 56K data+fax modem version 4.15
ATI4: 70 ----> this is NOT the LT WinModem with v.90
ATI5: 4.15,9,19
ATI6: ok

ATI4: 54 or 57----> this is the 33.6 LT WinModem
ATI4: 70 ----> this is the data/fax modem LT put out. It has KFlex
ATI4: 72 ----> this is the LT WinModem with v.90

LT WinModem
S38=0-V90=0
AT-V90=1 (enables v90)

Other possible settings for -v90=X
AT-V90=X Downstream Rate
0 V.90 disabled
1 Auto Rate (default)
2 28000
3 29333
4 30666
5 32000
6 33333
7 34666
8 36000
9 37333
10 38666
11 40000
12 41333
13 42666
14 44000
15 45333
16 46666
17 48000
18 49333
19 50666
20 52000
21 53333

LT Venus 56k PCMCIA:
AT&F S38=0 S109=2
at&fs109=2s10=55

Micromodem
Micromodem HSP
AT&F&C1&D2&K3W1
ATN0S37=12

MWave
ATS0=0Q0V1&C1&D2M
AT&F&C1&D2V1S0=0S2=128S7=55
-SSE1 to disable x2 on 56k Mwave modems

Motorola
Motorola Voice Surfer 56k w/v.90
AT&F&C1&D2&K3S202=32S91=9W2

Motorola SM56 WinModem
AT*MM12
AT+MS=V90,1 (enables v90)
AT+MS=K56FLEX,0

Newcom
At&F\N3W2
+ms=x2,1,0,0
this one disables v90 and is SUPPOSED to revert the modem to x2, but it actually reverts it to v34, but if you have line noise as a connection factor, this is the one that will keep it connected.

Packard Bell
Sound 4 WinModem (x2)
AT&F2S32=34 (to disable 56k)
Also try setting the Maximum Port Speed to 38400 and change the Flow Control to Software
AT&N16&U1
AT&F1X4&H1S25=50S28=0S38=1

Psion
Psion gold card v90
+MS=11,1

Rockwell chipset

Rockwell ISA Boards:
usually represented by ATI3 : vx.xxx-k56(or V90)_DLP or something
AT command fix : +MS=11,0

Rockwell PCI Boards: (HCF)
usually represented by ATI3 : v2.1.2.xxx.x
AT command fix : +MS=V34

Remember that a Rockwell-based K56Flex modem upgraded to V.90 no longer supports K56Flex

For most Rockwell ISA chipsets:
V.90 preferred(K56Flex will still work) +MS=12,1
Disable V.90 and K56Flex, use V.34 +MS=11,1

Rockwell HCF chipsets:
V.90 preferred(K56Flex will still work) +MS=V90
K56Flex preferred(V.90 will still work) +MS=K56FLEX
Disable V.90 and K56Flex, use V.34 +MS=V34

Rockwell HCF modem
ATS36=7S48=128 (V90 init)
AT&F&C1&D2&K3
AT&F&C1&D2&K3\N3%C3
ATS36=7S48=128+MR=1;+MS=V90
AT&F+MR=1;+MS=V34
AT&F+MR=1;+MS=V90

For example, to limit connection speed to 48k use:
AT+MS=V90,0,14400,48000,14400,48000

Rockwell RPI modem
AT&F&C1&D2S95=1
AT&F&C1&D2S37=9N0
also go into the modem or port information and lower the max speed of the modem to 9600

US Robotics - x2 and v90 chipsets
Sportster
X2 on, V.90 off S32=66
X2 off, V.90 on S32=34
Both off S32=98
Both on S32=2

Courier
X2 on, V.90 off S58=32
X2 off, V.90 on S58=1
Both off S58=33
Both on S58=0

USR Courier v.Everything
disables v.90 only ats58.5=1
disables x2 only ats58.0=1
disables x2 and v.90 ats58.0=1s58.5=1

USR V90 modems
AT&F2
AT&FX4S15=0S28=0
AT&F1X3 if receiving 676 (busies) after handshake

Sportster WinModems
AT&F1 S10=255 S12=0 S15=128 S27=64

Viking
Direct from Viking. Below are the init strings for our Rockwell chipset modems. Use the one that works best with the connection you have. You can eliminate the part before the + if it has an adverse effect.

Rockwell Chipset Modems:
V.90 Preferred, K56Flex Enabled : AT&FW2+MS=12,1
V.90 Only, K56Flex Disabled : AT&FW2+MS=12,1,34667,56000
K56Flex Preferred, V.90 Enabled : AT&FW2+MS=56,1
K56Flex Only, V.90 Disabled : AT&FW2+MS=56,1,34000,56000
Disable Both K56Flex and V.90, 28.8/33.6 Only : AT&FW2+MS=11,1

For the LT based Viking modems try...
AT&FW2S109=2 this will force a v90 connection (if possible)

Wisecom
Wisecom Accelerator Pro 56k
AT&F+MS=11,0

Xircom
Xircom CC ethernet modem
Direct from Xircom
If a connection cannot be established at all:
Try connecting at a lower speed. The following commands apply:
+MS=V34 Attempts to make a v.34 connection
+MS=V32B Attempts to make a v.32bis connection
+MS=V32 Attempts to make a v.32 connection
S37=19 Attempts to connect at 33600 Kbps
S37=17 Attempts to connect at 28000 Kbps
S37=13 Attempts to connect at 19200 Kbps
S37=11 Attempts to connect at 14400 Kbps

+MS=K56,,,32000 32 Kbps
+MS=K56,,,34000 34 Kbps
+MS=K56,,,36000 36 Kbps
+MS=K56,,,38000 38 Kbps
+MS=K56,,,40000 40 Kbps
+MS=K56,,,42000 42 Kbps
+MS=K56,,,44000 44 Kbps
+MS=K56,,,46000 46 Kbps
+MS=K56,,,48000 48 Kbps
+MS=K56,,,50000 50 Kbps
+MS=K56,,,52000 52 Kbps
NOTE: The commas in the above commands are required. They represent
the default values for that command string position.

Zoltrix
ATZ
1. V.42bis Auto Init String: AT&F&C1&D2W2
This configuration should be the only configuration required to make all possible connections.
2. V.42/MNP4 Auto Init String: AT&F&C1&D2W2S46=136%C0
This configuration is the same as V.42bis Auto except that all compression is turned off (V.42bis and MNP5 disabled).
3. MNP5 Init String: AT&F&C1&D2W2S48=128
This configuration will bypass the V.42bis and V.42 negotiation and attempt MNP5 first.
4. MNP4 Init String: AT&F&C1&D2W2S48=128%C0
This configuration will bypass the V.42bis and V.42 negotiation and attempt MNP4 first.
5. NORMAL Init String: AT&F&C1&D2&Q6W2
This configuration will not attempt V.42 or MNP but instead attempt a NORMAL connection.

Zoom
Zoom 56k
AT+MS=11,0,9600,33600

Zoom PCI 56K HCF Faxmodem
AT+MS=V34,0,9600,33600

Zoom Model 2819
AT+MS=12S7=100\N3 (enables v90)

Zoom 56k PCMCIA (LT Venus chipset)
s37=19

ISDN Adapter Information

3com Impact / Farallon Netopia
1B AT&F S61=2 S71=1 S80=0
2B AT&F S61=2 S71=1 S80=1

Adtran ISDN modem
AT E0 Q0 V1 X1 &C1 &D2 &L0 &Q0 &R0 &S0 S0=1 S54=11 <cr>
The <cr> needs to be in there and in lowercase letters.

Motorola Bit Surfer / Motorola Bit Surfer Pro
1B ISDN Access:
1B: AT&F&C1&D2%A2=95@B0=1
56K: AT&F&C1&D2\Q3%A2=95@B0=1@M2=P%A4=1
64K: AT&F&C1&D2\Q3%A2=95@B0=1@M2=P%A4=0

2B ISDN Access:
2B: AT&F&C1&D2\Q3%A2=95@B0=2@M2=P
112K: AT&F&C1&D2\Q3%A2=95@B0=2@M2=P%A4=1
128K: AT&F&C1&D2\Q3%A2=95@B0=2@M2=P%A4=0

If you are using the 2B access you must enter the access number twice separated by a &.

Example: 7702100&7702100

USR Courier I-modem
AT*V2=5

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Email:  design@theCyberImage.com