NEC NDA-24305 - page 162

CHAPTER 5 NDA-24305
Page 14 4
Revision 1.0
SIMULTANEOUS VOICE AND DATA TRANSMISSION-PRI
S-86 SIMULTANEOUS VOICE AND DATA TRANSMISSION-PRI
1. General Description
This feature is provided by NEC’s proprietary digital Dterm family of terminal equipment. A 64 kbps digital
voice signal and a data signal of up to 56 kbps can be transmitted simultaneous ly over the same wire. Voice and
data calls can be placed to differen t lo cations via PRI.
2. Operating Procedure
To place a voice communication.
1. Go off-hook or press the Dterm’s “SPEAKER” key.
2. The Prime Line LED flashes and Dial Tone is received. If the “SPEAKER” key is used, the SPEAKER LED
will illuminate steadily.
3. Dial a voice extension of the distant PBX.
4. When the called party answers, voice communication can begin.
To initiate a data call while the voice communication is in progress:
1. While a voice communication is progress, user ‘A’ presses the “DTX” key.
2. On user A's Dterm, the DTX LED illuminates, the DATA LED flashes and the LCD is displayed as
3. When user 'B' answers, both parties ‘DATA LED’s illuminate steadily, both LCDs display:
for Dterm Series III or for Dterm Series E, and data
communication can begin.
4. The voice communication is not interrupted during this process. After five seconds, the voice call display
returns.
The “DISP/AUTO” key may be pressed to return the following displays
for Dterm Series III or for Dterm Ser ies E.
To place a data call to a different location or while voice communication is not in progress:
1. Press the “D ATA” key on the Dterm. The LED above the key will illumin ate and “D” will appe ar on the LCD.
2. Use the keypad to dial the desired DTE extension. will appear on the display.
(“XXXX” refers to the called extension number).
3. The DATA LED will flash and, will appear (flashing) on the LCD.
4. When the called DTE answers, the display is changed as follows:
for Dterm Series III or fo r Dterm Series E
5. Data communication can begin.
D DTE XXXX
(Time Display)
RDY D DTE XXXX
(Time Display) READY D DTE XXXX
(Time Display)
RDY D DTE XXXX
(Time Display) READY D DTE XXXX (Time Display)
D XXXX
(Time Display)
D DTE XXXX
(Time Display)
RDY D DTE XXXX
(Time Display) READY D DTE XXXX
(Time Display)