Within ISDN different bearer capabilities are
used to signal the type of data (Voice, Data,
H320, H.324M), which is used by telephony
switches and other equipment to determine
how to handle data or calls (compressing voice
data neglect etc). The outgoing bearer capability
sets the ISDN bearer capability for the outgoing
telephone (voice only) and video telephone calls.

H.324M:

•

This ITU standardized capability

is selected for outgoing calls by default.

UDI:

•

In some situations the switch does

not accept calls which use the correct
H.324M capability. This setting makes it
possible to use the 3G Gateway in these
situations via selecting UDI.

PRI Protocol.

Select between the following

PRI protocols:

NI (National ISDN)

•

ATT (AT&T Custom)

•

Euro (ETSI = Euro ISDN)

•

Japan (Japan/Taiwan ISDN)

•

Save.

When all settings are

entered, click on

Save

store the new settings.
Note that changing from E1
to T1 configuration requires
a restart of the unit (click

Restart

to restart the unit).

Enable CRC-4.

Used for

most E1-PRI configurations.
If your network equipment
does not support this
feature, switch off PRI
CRC-4.

ISDN/PRI Configuration (ISDN/PRI Versions only)

All incoming calls are accepted
independent of their bearer
capabilities, consequently audio calls
are accepted as well.

Fractional line operation:

Low Channel

. Indicates the

lowest numbered E1/T1
B-channel the system is
allowed to use for each PRI-
line when selecting channels
for outgoing calls. Presently,
this setting has no effect.

PRI Interface Configuration.

Indicates the lowest
numbered E1/T1 B-channel
the system is allowed to
use for each PRI-line when
selecting channels for
outgoing calls. Not in use in
this version.

Prefix on National/International Numbers

•

Specifies the prefix, which has to be added

•

to National and International numbers,
respectively.

The signalling specifies whether the

•

call is national or international. Since
these prefixes are removed from inbound
telephone numbers, the correct prefixes
have to be added on call-backs.

These settings only apply if the Service
providers network uses prefixes for national
and international calls.