Testing the System
6-3
3981-A2-GN31-20
November 1996
The cellular call does not use MNP 10
Make sure that MNP 10 is enabled on your cellular
modem. The WDG will match the protocol that is selected
by the cellular modem.
Make sure that you are using an MNP 10 cellular
modem. MNP 10 must be available (and selected) on the
cellular modem in order to complete an MNP 10
connection.
The call drops immediately after “CONNECT”
Make sure that you have some type of error correcting
protocol, such as V.42 or MNP4, enabled. The WDG only
accepts cellular calls that have an error correcting protocol
active.
The call drops before connecting, or before
answer tone is heard
Verify that Audio Timeout is either set to 0 (disabled)
or to a value larger than 30 seconds.
Throughput is poor even during 9600 bps
connections
Make sure that your PSTN destination modem supports
V.32 data rates. The throughput of the call is limited by
the data rate of the slowest link. If the PSTN destination
modem only supports 1200 bps, then your throughput will
only be 1200 bps, even though you are connected at
9600 bps to the gateway.
Fax calls are being treated as data calls
The WDG does not support fax protocols. However, it
does detect fax calling tone. Upon detecting it, the
cellular-side modem signals the land-side modem not to
respond to any answer tone. The modems remain in audio
pass-through mode for the duration of the fax call.
While a fax call is active, the Dial LEDs of both
modems cycle 1.5 seconds on and 0.5 seconds off, and the
SDCP display for either modem says Fax Passthrough.
Verify that your originating fax modem produces a
standard fax calling tone (an 1100 Hz tone that is on for
500 milliseconds, then off for 3 seconds). Fax calls
initiated without the fax calling tone are treated as data
calls.
