Comdial FX Series Specifikace stáhnout pdf (Strana 98)

Dynamic Save Button

Unprogrammed buttons at multiline telephones are available for the user to dynamically save dialed

numbers. To save a number, the user presses any unprogrammed button before hanging up after he

or she has dialed a number. To dial the saved number, the user presses the same button and the

system automatically dials the saved number. Saving a number over a previously saved number

erases the old one and stores the new one in place of it.

E1 Digital Carrier

Transmission Option (international applications)

The E1 digital carrier transmission option is designed for international applications and allows up to

30 channels of voice and/or data transmissions over a single four-wire cable using multiplexing

techniques. For convenience, a customer service unit (CSU) is built into the E1 option board to

terminate the E1 channels, provide protection from transient voltages, and respond to loop-back

requests from the central office.

Installers can assign a system status button to a station and enable the system to report E1

transmission errors via the T1/E1 status log. Depending on how they program the system, the E1

status log either prints out on an optional printer or is displayed on an optional video display

terminal (VDT). Users can also view the E1 status log from an LCD speakerphone.

Also, installers can program the system to alert the system attendant whenever a major alarm alerting

condition occurs by activating an external, customer-supplied audible or visual alarm. Installers

determine when a major alarm alerting condition should occur by programming threshold values and

corresponding time periods for each type of alarm caused by a transmission error. Whenever the

threshold value is reached within the programmed time period the system activates the external

alarm. The system attendant can turn the alarm off from any specified station by dialing a feature

code.

Pad Level—Transmit, Receive (Gain and Attenuation Settings For Line Transmit and

Receive)

This feature enhances the T1–E1 digital carrier transmission option, the pad level programming

feature adjusts voice levels for both the transmit and receive circuits in the individual channels.

The choices include: Gain 2, Gain 1, Nominal, Loss 1, Loss 2, Loss 3, Loss 4, and Loss 5. These

settings provide an approximate +6 to -15 dB range of choices. Starting at the Nominal setting, each

gain level represents an approximate 3 dB amplification of the signal level from the previous setting,

and each loss level represents an approximate 3 dB attenuation of the signal level from the previous

setting. Because digital transmission does not lose volume level as readily as analog transmission

does, it is likely that the receive level may be noticeably higher when using the E1 option. Therefore,

installers may need to select a low setting such as Loss 2 for the voice level receive parameter when

programming this feature for E1 lines that are being used exclusively for voice transmission. Further,

if they choose a setting to increase the receive gain, they should carefully examine speakerphone

operation. It is possible to select a receive gain that will, under certain conditions, interfere with

proper speakerphone operation.

94 – Understanding the Features

GCA40–242 General Description

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Comdial FX Series Specifikace Strana 98