Multitech Multimodem MTCBA-G-F1 User Manual page 11

·
For GSM-without-GPRS, a circuit-
switched data connection is used. The
user can set up DUN to make a
conventional V.32 modem connection to
any terminating modem at the other end.
The phone number specified in DUN can
be one supplied by the wireless service
provider or another phone number
related to a different dialup modem
service (e.g, a dialup modem service
phone number from any commercial or
private dialup network).
·
For GSM-with-GPRS, a single DUN
number is generally used by all of a
wireless provider's subscribers
throughout its area of coverage (regional,
nationwide, continental, etc.). Rather than
being a literal phone directory number, as
in conventional DUN, this is a code that
gives the modem Internet access.
11
Product Description