Operation Manual

CAPI SoftFax
84 ISDN-Controller B1 v3.0 – 13 AVM System Architecture
If you use older ISDN applications that do not support this
method of data compression, you have the option of activat-
ing data compression directly in the driver software of the IS-
DN-Controller B1 v3.0. This switches on data compression for
all ISDN connections such that the controller will attempt to
negotiate V.24bis data compression with the remote site for
all X.75 connections, independent of the CAPI application. If
the remote site does not perform data compression, the data
will be transmitted without compression. This process takes
place in the background and is not apparent to the user.
The “Change Settings” sections for each operating system
describes how to activate or deactivate V.42 data compres-
sion after installation. In Novell NetWare this information is
contained in the sections “Starting ISDN-Controller B1 v3.0
Operation with Stand-Alone CAPI” on page 66 and “ISDN-
Controller B1 v3.0 with CAPI for the CAPI Manager” on
page 67.
If your computer does not meet the hardware requirements
or if unexpected problems arise during data exchange with
remote sites without V.42 capability, it is advisable to deacti-
vate data compression in both the driver and the applica-
tion.
If you have problems establishing a connection, try deacti-
vating data compression.
13.5 CAPI SoftFax
The CAPI SoftFax feature allows the controller to send faxes
on two B channels simultaneously at up to 14.4 Kbit/s, or to
receive a fax one one channel at up to 9.6 Kbit/s. The ISDN-
Controller B1 v3.0 acts as a standard Group 3 fax device.
The following fax protocols are supported:
l V.17 (14 .4 Kbit/s)
l V.29 (9.6 Kbit/s)
l ECM (Error Correction Mode)
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