Paradyne FrameSaver NP 110, User Manual

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5 Diagnostics
980-001-0240B FrameSaver NP 110 User’s Manual - Installation Guide 5-37
November 2000
DTE Dialing
Using
FrameSaver NP
110 AUX Ports
& Internal
Modem
In addition to the internal CSU and Option modules, the FrameSaver NP 110’s internal
modem may be shared by external devices, which interface the FrameSaver NP 110
through AUX ports 1 and 2. The modem sharing process is controlled by the DTR lead
of each connected device.
Before making the modem available to a requesting device, the FrameSaver NP 110
loads a user-configurable AT command string for that device from its database.
The DSR lead for the FrameSaver NP 110 AUX ports is OFF until that port is connect-
ed to the modem. Once the DSR lead is ON for a given port, the associated Router
(DTE) can issue its own AT strings to the modem.
RLSD follows DSR. CTS can be programmed to always be ON, follow RTS, or pro-
vide flow control in response to RTS. Modem configuration is done through the AUX
Setup fields on the System Configuration screen.
Outbound calling is accomplished in one of two ways:
•
DTR Dialing - the phone number to be called is stored in the FrameSaver NP
110.
•
AT Dialing - the Router issues the phone number.
Note:
It is important that the Router does not have DTR ON unless it wants to use
the modem, because this will prevent other devices from gaining access to the
modem.
DTR Dialing
1. The call is initiated by the Router turning DTR ON.
2. The FrameSaver NP 110 responds in one of two ways, based on the AT
Commands included in the Setup String for the AUX Port:
a. DSR comes ON as soon as the modem is available.
b. DSR follows the status of the far end connection.
3. The Router lowers DTR at the end of the call.
4. If the FrameSaver NP 110 was configured per 2a) above, DSR will go OFF after
the Router turns DTR OFF. If configured per 2b), DSR will go off after the
connection is broken by either end or if DTR is turned OFF.
AT Dialing
AT dialing is similar to DTR dialing, but the Router can issue the dialing command
strings.
1. The call is initiated by the Router turning DTR ON.
2. The FrameSaver NP 110 turns DSR ON when the modem is available.
3. The Router issues the necessary AT commands.
4. Connect messages can be enabled to indicate the connection status.
5. The Router lowers DTR at the end of the call.
6. DSR goes OFF after the Router turns DTR OFF.