Multitech MultiModem ZBA MT9234ZBA Guide de l'utilisateur télécharger pdf (Page 21)

Chapter 5 – Callback Security

Multi-Tech Systems, Inc. MT9234ZBA-Series User Guide 21

7. To store a callback phone number in the first memory location, type AT&Z0=[+][-]ATxxxxxxxx[,???], where

xxxxxxxx is the dialing string. Press Enter. The phone number must be preceded by DT for tone dialing or DP

for pulse dialing. The dialing string can also include other AT commands.

Example: AT&Z0=+-ATM0DT5551212. Up to 35 characters can be used. The +, -, and ??? characters are optional:

+ Number entry. Enables a mobile caller to enter his current phone number for callback.

- Direct connection. Enables a caller to choose direct connection without being called back.

,??? Extension entry. Must be used with the + command. Enables a caller to enter an extension number for

callback. The number of ? characters must equal the number of digits in the extension.

8. To store a callback phone number in the second memory location, type AT&Z1=[+][-]ATxxxxxxxx[,???],

where xxxxxxxx is the dialing string, and press Enter. Note that the memory location number in the

command is incremented by one.

9. Repeat, through memory location 29, until all dialing strings are entered.

10. To review your entries, type AT&V and press Enter.

Note: A form is provided on the last page of this chapter to help you plan or keep track of password and

phone number assignments.

Calling Procedures

Use the following procedures to call a modem that has callback security enabled. Note that Autoanswer must be

enabled on the calling modem (S0=1).

Password-Only Callback

Use this procedure when calling from a fixed location.

1. Using a data communications program such as HyperTerminal, dial the number of the callback modem.

2. When the connection is established, the callback modem responds with the following message:

Password>

3. Type the password corresponding to the phone number for your modem. Press Enter. You have three

attempts or one minute to enter a valid password.

4. If the password is valid, the following message appears, and the modems disconnect:

OK Disconnecting

5. After the delay specified by the #CBDn command, the callback modem calls the number associated with the

password. If the callback modem is unable to establish a connection, it tries again, up to the number of

attempts specified by the #CBAn command.

6. After the modems reconnect, the following message reappears:

Password>

7. Type the same password that you used to initiate the call. You are allowed three attempts to enter the

password, after which you will be disconnected.

8. If the password is valid, the following message appears and the modems establish a working connection:

OK Connecting

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Multitech MultiModem ZBA MT9234ZBA Guide de l'utilisateur Page 21