Nortel Message Registration, Описание и принцип действия

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Message Registration Description and operation
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Description
Message Registration (MR) is an optional software package that meters local
calls over designated central office (CO) trunks. The Message Registration
(MR) feature counts Reverse Battery (RVB) pulses from outgoing loop start
or ground start CO trunks. Pulses received are stored in software meters. Each
meter is assigned to a Directory Number (DN) or trunk access code that
requires metering.
The Message Registration feature allows each customer within the system to
keep an accurate record of CO calls for billing and administration purposes.
— Each Directory Number (DN) of three or more digits, including the
attendant DN, can be assigned a software meter. For multiple appearance
DNs, only one meter is assigned to meter all calls to the Prime DN
(PDN). Stations with multiple DN keys have a meter allocated for each
DN key.
— Meters can also be assigned to tie trunk routes. A tie route meter can be
assigned to the route access code of each tie route in the customer group.
An access code for a metered route must be at least three digits long.
— The system automatically assigns one customer meter for each customer
within the system. This customer meter is used to store pulses that cannot
be added to particular DN or trunk meters assigned in the customer
group.
Software meters are assigned in LDs 10 and 11. Each meter number
corresponds to the DN or trunk access code to which it is assigned. Meters
can be either ON or OFF. When a meter is turned off, pulses received are not
stored. The customer meter is always on and cannot be turned off. Meters can
also be turned on or off individually or in groups, using a background
terminal (BGD).