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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.
4.1.4 IP 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'
Service
Prefix '1'
4.1.5 Ethernet / LAN Interface (H.323)
The TANDBERG Gateway has two RJ-45 jacks
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)
4.1.5.1.1 IP 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.
D13192 Rev. 02
Technical Description of
Video call with maximum bandwidth 384kbps
Telephone call
TANDBERG Gateway
for the Ethernet interface (manual or automatic
5
with software version G2
10
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