TANDBERG D13192 Hotline, IP Dial Out Services, Service Prefixes, Ethernet / LAN Interface H.323

Technical Description of TANDBERG Gateway with software version G2

4.1.3.4 Hotline

When calling the Hotline number specified in the TANDBERG Gateway, the call is automatically transferred to a predefined H.323 alias. This feature can be used when an operator or helpdesk is needed.

All ISDN Dial In features (DID, IVR, TCS-4 and Hotline) can be used in any combination.

4.1.4IP Dial Out Services

4.1.4.1 Service Prefixes

A Service Prefix is used when dialing from a H.323 endpoint to a ISDN endpoint. By dialling the prefix, followed by the ISDN number, the call is transferred through the gateway, to the remote site on ISDN. The service defines the type of call (telephone/video) and bandwidth for the connection.

It is possible to define up to 20 different services on the TANDBERG Gateway.

The TANDBERG Gateway have two default services:

Service	Prefix ‘0’	Video call with maximum bandwidth 384kbps
Service	Prefix ‘1’	Telephone call

4.1.5Ethernet / LAN Interface (H.323)

The TANDBERG Gateway has two RJ-45 jacks5 for the Ethernet interface (manual or automatic detection of 10/100Mb) and supports call rates up to 2 Mbps. The ITU-T standard H.323 v4 protocol is implemented in the TANDBERG Gateway.

The following features are specifically relevant for this network interface:

4.1.5.1 Quality of Service features (QoS)

4.1.5.1.1IP precedence

IP precedence is a classification of packets from 0 (low priority) to 7 (high priority). The values 6 and 7 are typically reserved for congestion control. IP precedence helps a router select what kind of traffic to prioritise. By means of queue mechanisms, it can select

5 Ethernet port no.2 is not used in software version G2.

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