TANDBERG D5016402 user manual PRI Switch Type, Channel Hunting

Advanced Use TANDBERG Director Videoconferencing System

PRI Switch Type

Select the type of PRI switch to which your unit is connected.

Below is a list of common ISDN-PRI/T1 switches.

Type	Manufacturer	PRI Switch Type setting
ATT 4 ESS	AT&T	AT&T ISDN
ATT 5 ESS	AT&T/Lucent	AT&T ISDN or National ISDN*
DMS 100	Northern Telecom	National ISDN
DMS 250	Northern Telecom	National ISDN

* SETTINGS WILL DEPEND ON CONFIGURATION OF THE SWITCH. PRI SWITCH TYPE IS NOT CHANGED WHEN RESTORING DEFAULTS.

Channel Hunting

MAX CHANNELS	Maximum number of channels the unit may use at any given time.
LOW CHANNEL	The lowest numbered B-channel that may be used by the unit when
	selecting channels for outgoing calls.
HIGH CHANNEL	The highest numbered B-channel that may be used by the unit when
	selecting channels for outgoing calls.
SEARCH	Specifies where the system will start searching for available B-channels
	for outgoing calls.

Channel hunting is normally used in conjunction with PRI daisy- chaining with TANDBERG units in the daisy-chain. If only TANDBERG units are used in the daisy-chain, default setting should be used, as these units will find available B-channels automatically.

‘Max Channels’ may be used for PRIs that are provisioned for a lower number of channels.

‘Max Channels’ may be used as mechanism to ensure that there is bandwidth available to codecs further down the chain when Daisy-Chaining.

‘High Channel’, ‘Low Channel’ and ‘Search’ may be used for PRIs provisioned with specific requirements for B-channel usage.

PRI line

Codec 2 or

PBX

Codec 1

Low Channel: 10

High Channel: 20

Max Channel: 6

PRI 1

PRI 2

Channels: 1-9

will be available for the codec/PBX

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