Multi-Tech Systems ISIHP-2U, ISIHP-2S quick start S0=

Software/Driver Installation

A high DTR (Data Terminal Ready) signal on the serial port indicates that your computer or terminal is ready to communicate with your TA. DTR normally goes high when a communication program starts or is ready to dial. Persistent DTR dialing enables the TA to automatically redial the number stored in memory location 0 whenever DTR is high, and the serial port does not have an active call. You can enable or disable this feature. AT command: $D

• Auto Answer Data Calls _________ Rings to Answer _________

Select Auto Answer if you want the TA to automatically answer all incoming data calls (option does not affect analog port). The Rings to Answer number (range: 1—255) selects number of rings the TA waits before answering an incoming call. Default: 1 ring. AT command:

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•Dialing Method ________________________

Select either the Enbloc or the Overlap dialing method for use when establishing a data call. Your ISDN provider determines the dialing method. The enbloc method is used for most ISDN dialing; however, you can select the overlap method if you are working with a private network. AT command: %A97=

•Data Protocol _________________________

The data protocol, also known as the B-channel protocol and the rate adaption protocol, is the language spoken over each 64 Kbps channel between two ISDN devices. The devices on both ends of the ISDN link must use identical protocols. AT command: !Z

V.120 Protocol—provides rates up to 64000 bps on each B channel.

PPPProtocol—provides rates up to 64 Kbps per channel.

•Stored Numbers ________________________

The TA can optionally store as many as 10 phone numbers, up to 20 characters each. AT command: &Z=

•Dialing Stored Numbers _________________

The TA can dial a number previously stored in directory number n using the &Zn=x command. AT command: e.g., DS3

MultiModemISI Hybrid Series, ISIHP-2S/2U 43