What is the relevance of the “minimum and maximum” capacity levels?
This important feature means a local ISDN device, or a group of devices can be configured with the Minimum number of “B” channels available to it, and the Maximum it is allowed to access. Take as an example a site with a PABX on a PRI line, a router on a PRI and a group of BRI ports, all sharing a single PRI via Liberator. During the day you could configure the PABX with a Minimum of 10 channels and a Maximum of 15; the router with a Minimum of 4 and a Maximum of 10; the BRI group with a Minimum of 2 and maximum of 8. Overall, the total sum of Minimum channels is 10+4+2=16. These channels are held in reserve for the appropriate devices so they are immediately available for access. This leaves a “float” of 14 channels available from the PRI. These “floating” or shared 14 channels can be accessed as-required by any of the three ISDN devices, up to their maximum allocation, on a first-come basis. The “float” or shared channels means the ISDN service is used most efficiently but with all d
