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1. To activate the Callback tab, press the Menu key.
2. Set Use callback to Yes if you have a service that dials back to your phone when you
establish an Internet connection. Callback works as follows: you first dial into the IAP,
and request callback. The data call is then closed. Within a minute, the IAP has to call
back to your communicator.
3. Select the Callback type. You have the option of choosing between IETF PPP callback
protocol, which calls back to a number stored on the callback server, and two different
modes of Microsoft callback protocol, one of which uses a number stored on the server,
and one which uses a client-supplied phone number.
4. If you selected Use number below, type in your Callback number. This number is usually
the data call phone number (not the voice number) of your communicator. This is filled in
when using Microsoft callback protocol in a mode where the client specifies the number
to call back.
The Callback call from the remote server must use the same data call settings as the
callback-requesting call. The network has to support the call type in both directions (to and
from the communicator). You may need to ask your ISP to configure the callback server
accordingly, and check with your network provider as to whether the GSM network supports
this functionality.
1.2.4 Other Settings
1. To activate the Other tab, press the Menu key.
2. Set Allow plain-text login to No if you don’t want to send your password as plain text
without encryption. Note that this option only affects PPP connections and some ISPs
require that this setting be set to Yes. Check with your ISP: if your ISP supports CHAP or
MS-CHAP, set this to No; if they only support PAP, set this to Yes.
3. Set Use PPP compression to Yes to enable compression. When set to Yes, this option
speeds up the data transfer (especially when downloading text and other compressible
information) if it is supported by the remote PPP server. If you have problems
establishing a connection, try setting this to No.
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