Nortel DMS-100 Series General Description Manual

Also see for DMS-100 Series: User guide Product guide Manual Maintenance manual Maintenance manual

Contents

Nortel DMS-100 Series General Description Manual Manual pdf 55 page image

DMS-100 ringing overview 1-39DMS-100 Family DMS-100 Ringing System BASE15 and upProvisioning ringing generatorsThis section describes considerations that must be given to ringing whenprovisioning DMS-100 lines peripherals. You can find guidelines forprovisioning lines peripheral modules by referring to the ProvisioningManual.When assigning lines to line peripherals, pay close attention to the number andtype of lines assigned to each peripheral to prevent ringing generator overloadconditions.Although Table 1-4, "Summary of ringing in peripheral modules" on page1-32 states the maximum number of lines each ringing generator can ringsimultaneously, the actual value will vary depending on the characteristics ofthe line. Specifically, the typical line impedance (consisting of loop resistance,capacitance, and inductance), the number of ringers on the line, and the typeof ringers on the line affect the number of lines a ringing generator can ring.When assigning lines to peripheral modules (PM), in addition to theconsiderations listed in Provisioning Manual you must consider the typicalloop length and the number of ringers per line in your office when using trafficstudy data for provisioning peripherals. Determine the maximum number oflines you expect to be rung simultaneously at any given time and compare tothe maximum number of lines stated in the Table 1-4, "Summary of ringing inperipheral modules." which are based on three ringers per line and a short looplength.If it appears the ringing generator may be overloaded, you should considerredistributing the load to other PMs to prevent the possibility of call blockingdue to ringing generator overload.Ringer configurationsThe following ringer configurations are used with the DMS-100 switch:• bridged• tip• ringEach of these configurations is illustrated in the following figure.