Notice of Fast Connect & Quick Connect

Description: Fast Connect is implemented by US Robotics/3Com with their MODEM product on V.22/V.22bis. Fast Connect can reduce the connection time “dramatically”. The Fast Connect feature requires “Isfastconnect” bit and both server/client with compatible chip(Hardware) and settings(Firmware).

Unlike Fast Connect, Quick Connect is implemented by LSI (Previously Agere) Lucent, Quick Connect can be done without client compatibility. The Quick Connect can also reduce the connection time.

Fast Connect –

Quick Connect –

Fast Connect:
How do I enable Fast Connect?
V.22 Fast Connect allows the modem to make a 1200 bps connection much quicker than the standard V.22 handshake time, making it ideal for the very small data transfers encountered in Point of Sale or ATM systems. Note that the modem or server at the far end must also be configured for V.22 Fast Connect, and the same Error Correction ON/OFF setting.

Enabling V.22 Fast Connect
V.22 Fast Connect can be enabled by setting AT commands which may vary by product.

USR5637, USRxx5637, USR2980-OEM, and USR802981-OEM
Additional AT command strings: AT +MS=V22 ( selects V.22 connection at 1200 bps )
AT &M0 ( if disabling Error Correction protocol )
AT &A0 ( if shortening the result code to “CONNECT 1200” )
AT F1 ( enables V.22 Fast Connect, must be issued before each connection attempt )

Quick Connect
Quick Connect – The command +PQC=# controls Quick Connect. The values are – 0 to enable Quick Connect (short phase 1 and phase 2 enabled); 1 – enable short phase 1 only; 2 – enable short phase 2 only; 3 – disable short phase 1 and phase 2.


The above command will be all available on HyperTerminal direct open at COM port(COMx) instead of the driver/hardware(Agere ****).


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