USER’S GUIDE
392 CyberSWITCH
R
ELATIONSHIPS
BETWEEN
D
IGITAL
M
ODEM
AND
OTHER
F
EATURES
Note the following:
•
RADIUS Authentication: Authentication is performed before the call is routed to the Digital
Modem Adapter. Once the call is validated, the call is routed to the Digital Modem Adapter to
establish a modem link.
•
Throughput Monitoring: Overload and Underload conditions do not apply, since the Digital
Modem feature only uses one B-channel per call. However, the Idle condition (in which the sys-
tem releases an idle call after a certain length of time) is still valid. Since this condition may not
be as important to analog calls as it would be to ISDN calls, you may want to set this threshold
higher than the default. You may do so using the Manage Mode command:
thruput
change.
•
Concerning the
cs
,
mc
and
cdr
commands: the data rate displayed for Digital Modem calls
will be the actual transmit rate from the CyberSWITCH’s perspective. If no rate is reported by
the modem, then the value will default to 64K.
D
EFAULT
A
SYNC
P
ROTOCOL
The default async protocol option applies to digital modem applications only. It allows you to
specify default values for the CyberSWITCH when handling incoming asynchronous calls. The
configurable options include:
•
PPP Mode: for standard async-PPP data transfer. This mode assures that the digital modem
connects the caller to a PPP stack, performs an async-PPP-to-sync-PPP conversion, and then
sends the data to the LAN as appropriate.
•
Terminal Mode: provides a means for user-level authentication before PPP data transfer, or pro-
vides remote analog console access for system management.
•
Call Disconnect: automatically disconnects call if no data received within the configured data
time-out duration.
When an incoming connection is established to the CyberSWITCH, system software “autosenses”
the type of connection. It looks at the first few bytes of received data and determines whether the
connection is terminal mode or PPP mode. If no data is received within a configurable amount of
time, the system takes action based on the configured default parameter. A description of the
configuration of this default parameter follows.
PPP M
ODE
U
SING
CFGEDIT
To set the default to PPP mode:
1.
From Options, select Default Async Protocol.
2.
Select Action on Data Timeout.
3.
Select Use PPP Protocol.
4.
Next, select Data Timeout Value. Change value, in seconds as desired (minimum: 1; maximum:
60).
U
SING
M
ANAGE
M
ODE
termopt
Allows you to change the default async protocol configuration as if you were in the CFGEDIT
screen.
