Operation Manual

139
6 Possible Errors and Remedies
English
the GSM network. Wait a while and then repeat the
attempt. If this problem persists, contact your GSM
operator.
If you are a D1 subscriber, verify that fax and data
services are enabled.
Make sure you have entered the correct number for
the site you want to call.
You are unable to connect to ISDN terminal equipment at
PBX extensions.
The PBX at the remote site has not been correctly
configured for the terminal equipment in use. Contact
your communications partner.
You are unable to connect to a fax machine at an ISDN
PBX extension.
The PBX at the remote site has not been correctly
configured for Group 3 fax service. Contact your
communications partner.
You are unable to receive incoming calls.
In certain GSM networks you must apply for separate fax
and data numbers in order to receive incoming fax and
data calls.
Your GSM cellphone rings for an incoming fax call, but
your computer doesn’t answer it.
Check whether your fax software automatically activates
a server module. This is a program that monitors the line
so that your computer reacts to incoming fax calls. Some
fax programs, such as FRITZ!fax, can be configured to
start the fax server module automatically.
Loading DOS and Windows drivers simultaneously
DOS and Windows drivers may not be loaded simulta-
neously. Load either the DOS driver or the Windows
driver, not both, to use your AVM Mobile ISDN-Control-
ler M1. Note that the Windows drivers also support DOS-
based CAPI applications running under Windows!