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CHAPTER 5 NDA-24305
Page 72
Revision 1.0
DATA COMMUNICATIONS-PRI
D-121 DATA COMMUNICATIONS-PRI
1. General Description
This feature enables data communication between two systems, through PRI over ISDN (Digital Line Link). The
ISDN link can be accessed through various connections.
Note:
Unrestricted Data:
• The following communication speeds are supported:
Asynchronous Synchronous
50-9600 bps 2.4K, 4.8K, 9.6K, and 48K bps
2. Operating Procedure
1. Modem-to-Modem.
(Figure 5-1 illustrates a typical Modem-to-Modem connection.)
Figure 5-1 Typical Modem-to-Modem Connection
(a) An analog telephone user with a modem dials a remote extension which also has a modem.
(b) The remote modem rings and is manually or automatically answered.
(c) The remote modem returns answer tone (modem tone).
(d) Both modems exchange carrier signals.
(e) A data communications path is established.
16LC
DTE
PRI 16LCPRI
Analog
Station
Sync. or Async.
Modem
DTE
Analog
Station
Sync. or Async.
Modem
PBX PBX
ISDN