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VISION 5000 Videoconferencing System
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Advanced use
PRI Switch Type
========= PRI Switch Type =========
PRI Switch Type:
AT&T ISDN
National ISDN
Previous Menu
Channel Hunting
========= Channel Hunting =========
Low Channel: _____
High Channel: _____
Search: High Low
Previous Menu
Select the type of PRI network to which your unit is connected.
Below is a list of common PRI 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 is normally only used with a PRI unit in the daisy chain which is not a Vision 5000. The
channels outside low and high can then be reserved by other devices.
Channel hunting defines where to search for channels for outgoing calls. Low Channel default is 1 and High
Channel default is 23.
Search defines if the channel search will start from the highest or lowest channel.