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NOTE: Be sure to notify users of this button change as it is different from information provided in

the user’s guides.

Location Code 4 (Argentina and Chile)

Standard system default codes for all system features except:

•

transmission and receive levels set to meet local standards,

•

frequency and cadence of call progress tones set to local standards.

Location Code 5 (Israel)

Standard system default codes for all system features except:

•

transmission and receive levels set to meet local standards,

•

frequency and cadence of call progress tones set to local standards

Lock Button

When the installer maps a telephone with this button, a user can press the button and dial an

authorization code to deny other users access to lines and features at his or her telephone. Also refer

to the discussion titled Authorization Codes.

Loop-Start Line Board with

Call Metering (DXP and DXP Plus only)

The loop-start line board (product code, DXPCO–MT8xx) for the DXP and DXP Plus digital

communications systems provides interface for loop-start lines and includes a call metering feature

for use with those central office (CO) lines that provide a call metering call costing service. Call

metering service is an international feature that is not normally offered in the United States.

On those CO lines that provide call metering service, the call metering feature provides an accurate

method of determining the cost of any outside call. The call metering feature provides transverse call

metering tone detection, and in general, works as described in the following paragraph.

The CO provides metering tone bursts on the line during an active toll call. Each burst represents one

call cost unit. The more bursts per unit time, the more expensive the call. The call metering circuits

on the loop-start line board trap the metering tone energy from the audio circuits and report the

presence or absence of tone envelopes to a processor. In this way, the software performs on-line,

real-time call costing.

NOTE: The digital communications equipment counts the meter pulses (tones) and reports them via

its SMDA feature; however, it does not calculate call cost based on pulse metering. Actual call

cost calculation requires an external computer running the proper call costing software that

can break apart the SMDA format and read the meter pulse count.

For installation instructions that cover the loop start board with call metering, request Comdial

publication IMI89–308 from your Inside Sales Representative.

116 – Understanding the Features

GCA40–242 General Description

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