TANDBERG D13192 manual Aggregation Standards, Isdn channel set-up, 2 H.221, 3 H0

Technical Description of TANDBERG Gateway with software version G2

4.2 Aggregation Standards

ISDN Aggregation	H.221	Frame Structure from 64 (56*) kbps to 128 kbps
	ISO 13871	BONDING, Mode 1 from 64 (56*) kbps to 2 Mbps
	H0	One 384 kbps channel

4.2.1BONDING

•ISO 13871, BONDING Mode 1 for bit rates from 56 kbps up to 2 Mbps (1 to 30 channels).

•The maximum relative delay difference between B-channels is 0.5 second (i.e. to compensate for different routing of channels).

The following are the standard bandwidths on H.320: 30ch – 24 – 23 – 18 – 12 – 8 – 6 – 5 – 4 – 3 – 2 – 1

4.2.1.1 ISDN channel set-up

The following is a description of how the ISDN channels are set up.

Incoming & Outgoing TANDBERG Gateway calls: Normally the TANDBERG Gateway will set up only 1 channel from PRI 1 and build up the channels starting from the 'bottom' of the last PRI in use.

This will ensure that the TANDBERG Gateway always have available channels on the first PRI number (which normally should be the TANDBERG Gateway 's main number).

4.2.2H.221

•For bit rates from 56 kbps up to 128 kbps (1 or 2 channels).

•The maximum relative delay difference between the 2 B-channels is 0.6 second.

4.2.3H0

H0 is an ITU defined 384 kbps service available for ISDN PRI. The TANDBERG Gateway supports H0 on incoming ISDN calls. H0 is defined as a group of 6 ISDN channels multiplexed to provide one 384 kbps channel. H0 may have a shorter connection time, since there is only one channel to set up.

This service is sometimes called Switched 384 or ISDN H0.

D13192 Rev. 02 20