Operation Manual

Configuring ISDN Call Destinations 141
30b.Enter the CLI number of the remote site.
If the remote site calls you from a call number pool, you have to
register all remote CLI numbers in that pool in your CLI List for the
call destination.
30c. To return to the ISDN Call Destination Configuration ,
press <Esc> and save your changes.
31. Check the Header Compression .
Header Compression is a set of standard compression options
intended to eliminate nonessential information from the network
protocol header and maximize the bandwidth available from
ISDN connections. IPX headers can maximally be compresses
from 36 to 2 bytes, and TCP/IP headers from 40 to 3 bytes.
According to the network protocol used, CIPX Header Compres-
sion (RFC 1553) or Van Jacobsen TCP/IP Header Compression
(RFC 1144) can be enabled.
Header compression can also be performed on the network
protocol level for IPX. It is configured in the Expert Binding
Options. However, header compression on the ISDN driver level
is more effective since compression is performed on the ISDN-
Controller and does not take memory from the server.
Header Compression is negotiated during call set-up with a remote site.
If the remote site is not able to apply it, it is not used.
Default: Enabled
Options: Enabled, Disabled
If Header Compression is performed on the ISDN driver level,
header compression on the network protocol level is switched
off.
After header compression, data compression according to V.42bis
can be applied.
32. Check the Data Compression .
This parameter specifies whether the data shall be compressed
during transmission to increase transmission rate. Data compres-
sion is more effective than header compression and achieves a
compression rate of up to 8:1.
Important
Note