user manual

ND-20292
CHAPTER 1
APRIL, 1990
5.
PSE-DD-1 PSU
This power supply accepts a DC input voltage of
: -48VDC and converts it to the necessary operating DC
voltages of -5V, + 5V and -24V, required by a CCU.
The PSU allows the system to be powered from a
locally provided nominal -48VDC power source.
Battery Backup can be connected to the -48V DC power
source, thereby avoiding disruptions of system
operations caused by commercial power failures and
brownouts.
The PSE-AD-( ) and PSE-DD( ) should not be installed
in the same system. Operational integrity of the
system may be degraded if power is lost to individual
ccu’s.
6. RSG-E UNIT
The RSG-E Unit is the Ringing Supply Generator
required to provide ringing signal to Single Line
Telephones (SLTs), modems, and a Voice Mail system.
The RSG-E Unit is mounted into the CCU (next to the
PSU) to support up to thirty two SLTs, up to four
modems, and/or Voice Mail.
The RSG-E Unit installed in a CCU supplies ringing
signal to SLTs, Voice Mail and modems connected to
that CCU. One RSG-E Unit can supply ringing signal
to an adjacent CCU, if the combined CCU ringing
requirements are not exceeded.
7. RAA-E UNIT
The Remote Administration Adaptor (RAA-E)
provides access to the Electra Mark11 System program
from a remote location. The system program can be
changed, defective ports can be busied out or put back
into service, after the problem is corrected.
To accomplish this function, the following equipment
is required:
a. At Job Site:
1. CPU-EB(or higher revision level) ETU
2. ESI-E( ) ETU Tone circuit for RAA-E
termination)
3. Modem (212A compatible with auto answer)
4. SLI-E( ) (one circuit for Modem termination if
required) ETU
5. RSG-E unit (if Modem terminates on an
SLI-E( ) ETU)
b. At the Remote Location:
1. Modem (212A)
2. NEC Powermate or IBM compatible PC i
3. RAA Host Disk
t or any RAA-E compatible unit, ie., NEC PC8300
Laptop Computer, NEC PC8231A Floppy Disk Drive,
NEC Multispeed, Datavu’s SPARK laptop.
8. CPU-E ETU
A CPU-E (or higher revision level) ETU is the Central
Processing Unit and the heart of this system. It
provides overall control via the main processor (16 bit
microprocessor) by communicating with the
distributed processors mounted on the TSW-E( 1 and
MMC-E ETUs.
The CPUs RAM memory is backed up with a
rechargeable NiCad battery which will retain the
memory for up to seven days.
One CPU-E (or higher revision level) ETU must be
installed in the ESE-32B-1 CCU.
9. MMC-E ETU
The MMC-E ETU is the Module Memory, with a 4 bit
microprocessor, and Controller Unit required for each
ESE-32E-1 CCU. It controls data transmission
between the CPU-E( ) ETU and the interface cards
installed in the ESE-32E-1 CCU in which the MMC-E
ETU is installed.
Data from and to the CPU-Et 1 ETU and each interface
card is temporarily stored in the memories of the
MMC-E ETU.
10. TSW-E ETU
The TSW-E ETU is the Time Division Switch Unit
required for the ESE-32B-1 CCU. It supplies most of
the tones required in processing telephone calls. It
establishes paths between stations and outside lines,
extension lines or call process tones.
The TSW-E ETU also has functions similar to the
MMC-E ETU in the ESE-32B-1 CCU and provides the
source output for external paging.
To connect MOH and BGM sources, the TSW-E ETU
houses audio digitizer circuits to change analog signals
to digital signals.
11. TSW-EB ETU
The TSW-EB ETU is the Time Division Switch Unit
required for the ESE-32B-1 CCU when the fourth CCU
is installed. It supplies most of the tones required in
processing telephone calls and it also establishes paths
between stations and outside lines, extension lines or
call process tones, the same as the TSW-E ETU.
The TSW-EB ETU also has an additional connector to
interface to the fourth MMC-E ETU in the third ESE-
32E-1 CCU.
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