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CHAPTER 5 NDA-24305
Page 144
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 D
term
family of terminal equipment. A 64 kbps digital
voice signal and a data signal of up to 56 kbps can be transmitted simultaneously over the same wire. Voice and
data calls can be placed to different locations via PRI.
2. Operating Procedure
To place a voice communication.
1. Go off-hook or press the D
term
’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 D
term
, 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 D
term
Series III or for D
term
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 D
term
Series III or for D
term
Series E.
To place a data call to a different location or while voice communication is not in progress:
1. Press the “DATA” key on the D
term
. The LED above the key will illuminate and “D” will appear 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 D
term
Series III or for D
term
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)