NEC nd-20292 manual Sli-Eb Etu, Mfr-Ea Etu, Cnf-E Etu, Ecr-E Etu, Vmi-E Etu, Lcr-Etu

A maximum of nineteen SLI-EA ETUs can be installed

~per system.

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20.SLI-EB ETU

The SLI-EB ETU is a Single Line Telephone Interface Unit which includes the functions of the SLI-EA ETU

and provides Message Wuiting indication to SLTs equipped with a Message Wuiting lamp.

Each SLI-EB ETU contains four identical circuits to serve up to four SLTs.

The SLI-EB ETU is required for use with power failure transfer of COs to SLTs.

A maximum of nineteen SLI-EB ETUs can be installed per system.

21.MFR-EA ETU

The MFR-EA ETU is a Dual Tone Multi-Frequency Receiver Unit that is used to receive and translate the DTMF signals generated by the SLTs or Voice Mail System.

Each MFR-EA ETU provides two receiver circuits shared by SLTs in a system. When no SLTs or VMI-E ETUs are installed in a system, MFR-EA ETUs are not

:.required.

A maximum of four MFR-EA ETUs can be installed per system.

22.CNF-E ETU

The CNF-E ETU is the Conference Unit that is used to

establish a non-amplified Conference between a

maximum of four parties, both outside lines and

extensions. No more than two outside lines can participate in a Conference call.

A CNF-E ETU is required for each Conference in progress.

A maximum of four CNF-E ETUs can be installed per system.

23.ECR-E ETU

The ECR-E ETU is the External Control Relay Unit that provides control circuits to access one or all three

External Paging Zones. If the locally provided amplifier is a both way amplifier, two way paging is a’vailable. The ECR-E ETU also provides circuitry for

External Ringing applications and Night Chime control in the night mode.

The ECR-E ETU also contains input jacks. The first jack is an input for a Music source for Background Music via the built in speaker of the Multiline

ND-20292

CHAPTER 1

APRIL, 1990

Terminals. The second jack is for an alternative music

source or as the playback input for a Delay Announcement unit when used with UCD. The ECR-E ETU also provides an output jack for continuous ring tone.

A maximum of one ECR-E ETU can be installed per system.

24.VMI-E ETU

The Voice Mail Interface has four circuits used to

interface between the Electra Mark11 Digital Telephone System and a locally provided Voice Mail system. The VMI-E generates DTMF for control of the Voice Mail equipment and provides it with access to MFR-EA ETUs. The system requires an RSG-E Unit to support the VMI-E ETU. Single Line Telephones, DTMF controlled dictation equipment, or a modem can be connected to any unused ports of the VMI-E ETU.

A CPU-EB (or higher revision level) ETU is required to support the connection of an SLT, modem, or DTMF controlled dictation equipment to the VMI-E ETU.

A maximum of two VMI-E ETUs (which allows for 8 ports for Voice Mail) may be installed if a CPU-EC4 (or higher revision level) is installed. Otherwise, only one VMI-E ETU can be installed.

26.SMDR-E ETU

The SMDR-E ETU (Station Message Detail Recording Unit) provides the user with detailed call reports on the usage of the system. Detailed call reports include

number dialed, time of initiated/received call, trunk number, trunk group, type of call (outgoing, incoming, transferred, conferenced), station number, length of call, date, account code (if entered), and LCR status. A printer or other peripheral device must be connected to the RS232C connector from the SMDR-E ETU. The call buffer is protected against power loss by a battery. Data output speed range is from 300 to 4800 baud and is set by a switch mounted on the SMDR-E ETU.

A maximum of one SMDR-E ETU can be installed per system.

26.LCR-ETU

The LCR-E ETU is the Least Cost Routing Unit that provides the user with the least costly available route when placing outside calls.

The LCR programmed data base is protected against power loss by a battery. Data output speed range is from 150 to 9600 baud and is set by a switch mounted on the LCR-E ETU.

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