NEC NDA-24305 - page 91

NDA-24305 CHAPTER 5
Page 73
Revision 1.0
DATA COMMUNICATIONS-PRI
2. Modem Pool to Modem Pool. (Illustrated in Figure 5-2.)
Figure 5-2 Modem Pool to Modem Pool
• Asynchronous Data Terminal connected to a Data Module;
1. Enter “DM CALL <ENTER>” on the DTE keyboard; “READY” is returned.
2. Enter the number of the remote DTE: “DIAL XXXXX <ENTER>”.
3. “CALLING” is returned and the local modem pool is transferred to ISDN.
4. “WAITING” will be displayed until the call is a nswered.
5. The remote Data Module or Data Adapter manually or automatically answers the data call and the
remote modem pool is connected between the called st ation a n d the IS DN netwo r k.
6. “OPEN” is returned to the calling Data Module.
7. The remote modem pool sends answer tone.
8. Both modems exchange carrier signals.
9. Data transmission can begin.
10. To terminate the data call, enter “<ESC>-DM <ENTER>”.
11. “ACK” is returned; enter “RLS <ENT ER>” to disconnect from the Data Module.
12. “RELEASED” is returned when the data path is disconnected.
• Asynchronous data terminal connected to a Data Adapter via a Dterm;
1. Press the “VOICE LINE” key to originate.
2. Dial the number of the terminal you want to call, “XXXXXX”.
3. “XXX YY” is displayed on the Dterm and the LED of the voice key lights (XXX=trunk type,
YY=trunk number). For example, DDD 36.
4. The remote Data Module or Data Adapter manually or automatically answers the data call and the
remote modem pool is transferred in between the called station and the ISDN channel.
5. The remote modem sends answer tone.
6. On receipt of the answer tone, the Dterm user presses the “DTX” key.
7. “WAIT D XXX YY” is displayed when the called terminal is idle (XXX=trunk type, YY=trunk
number).
8. The local modem pool is transferred in between the Dterm Data Adapter a nd the local PRI channel .
9. Both modems exchange carrier signals.
10. “RDY D XXX YY” (for Dterm Series III)/“READY D XXX YY ” (for Dterm Series E) is displayed
on calling Dterm (XXX=trunk type, YY=trunk number).
11. Data transmission can begin.
DM or DA
(Async. Only) DM or DA (Async. Only)
DTE
PRI
DTE
PBX PBX
PRI
Modem
Pool
Modem
Pool
ISDN