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Technical Description of TANDBERG Gateway with software version G2
D13192 Rev. 02 16
Scenario: TANDBERG Gateway is connected via a CSU (i.e. a NT ‘Network Termination’) as
follows:
TANDBERG Gateway –cableA–CSU–cableB–Network
If a CSU loses framing/sync from the network (example: a bad cable B), it shall no longer send
valid framing out on cable A towards the TANDBERG Gateway. Instead it transmits "Blue
Alarm". Seen from the TANDBERG Gateway receiving blue alarm, this means that the network
on the far side of the CSU is unavailable.
4.1.7 Intelligent Call Management (ICM)
By using TANDBERG's inbuilt Intelligent Call Management (ICM), TANDBERG Gateway
conferences can be made from data rates up to 2 Mbps via ISDN networks.
ICM is a highly sophisticated feature provided by the TANDBERG Gateway that e.g. makes the
connection between two sites more reliable and safe. If the ISDN network drops channels
during a meeting, the conference will not shut down but adjust to the remaining number of
available channels
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. This ability is called ‘Downspeeding’ and is in accordance to the
BONDING Mode 1 standard.
By defining a maximum bandwidth for the different services (DID, IVR, TCS-4, Hotline, H.323
services), all connections will be restricted to these bandwidths.
If the requested bandwidth is not available in the TANDBERG Gateway or in the receiving
endpoint, the TANDBERG Gateway will set up the connection using the available resources.
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If the connected site does not support downspeeding, the site will drop out of the call.