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NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1
Page 121
Simultaneous Voice and Data Transmissions - PRI S-86
S-86 Simultaneous Voice and Data Transmissions -
PRI
General Description
This feature is provided by NEC’s proprietary NEAX2400 IPX 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 2-pair
cable. Voice and data calls can be placed to different locations via PRI.
Operating Procedure
To place a voice call
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
illuminates 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 call is in progress
1. While a voice call is in progress, user A presses the DTX key.
2. On user A’s D
term
, the DTX LED illuminates, the DATA LED flashes, and displays:
3. When user B answers, both parties’ DATA LEDs illuminate steadily; both LCDs display:
Data communication can begin.
4. The voice call is not interrupted during this process. After 5 seconds, the voice call display returns.
The DSPY/AUTO key can be pressed to return the following display:
(Time Display)
D
DTE
XXXX
(Time Display)
READY
D
DTE
XXXX
(Time Display)
READY D DTE XXXX