2-8 NT5K18 Exchange Line Trunk Card
553-3001-173 UK Trunk cards description
Features description
Periodic Pulse Metering (PPM)
All trunk types on the NT5K18 circuit card support the Periodic Pulse
Metering (PPM) feature, or Subscriber Pulse Metering (SPM), as it is
sometimes called.
Periodic Pulse metering allows the user of each telephone on a Meridian 1
to keep an accurate record of Public Switched Telephone Network (PSTN)
and Direct Outward Dialing (DOD) calls for billing or administration.
Note: Although the PPM feature is configured on a per trunk basis,
the message which is downloaded to hardware is on a per card basis.
When PPM is assigned to a unit, every unit on the card automatically
receives the feature.
For information on PPM feature requirements, feature interactions, and
feature implementation, refer to Generic X11 Including Supplementary
Features appendix 2 to 553—2311—105.
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