Fms(2/4)-U13 Etu - NEC Xen Master System Hardware Manual

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5.5.5 Connectors
The VMS(2/4/8)-U13 ETU has the following connectors:
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5.5.6 Installation Precautions
The ETUs used in this system make extensive use of
CMOS technology that is very susceptible to static
electricity. Static discharge must be avoided when
handling ETUs. Always use the following precautions:
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5.6

FMS(2/4)-U13 ETU

5.6.1 Description
The FMS(2/4)-U13 ETU is a 2 or 4 port Digital Voice Mail
system.
This ETU is a PC platform installed in the Xen system and
contains Flash ROM space for voice recording storage and
application software. A digital signal processor/voice
processing section handles the following functions:
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J9 connects to the backboard
J1 (9-pin RS-232) is COM1 and is used for PC
Programming of the VMS(2/4/8)-U13 ETU. The PC
can be connected directly or via an external modem.
J8 and J10 accommodation the DSP-F-21 Unit.
J2 and J3 are not used.
Wear a grounding strap anytime you handle the ETU.
Make all ETU DIP switch setting changes before
inserting it in the KSU. Ensure that Make Busy switch
is off.
Carry ETU in a conductive polyethylene bag to
prevent static electricity damage.
DTMF detection
DTMF generation
General tone detection
FAX CNG tone detection
PCM compression for audio recording/playback
Automatic gain control (AGC)
A serial port capable of direct connect speeds up to
19.2 Kbps or for connecting external modem.
Installing Electronic Telephone Units
Xen Master & Xen Axis