User`s guide

Local Management User’s Guide D-1
D Modem Settings for RS-232 Dial-up PPP Backup
This appendix details the backup configuration of a Frame Relay or PPP nailed-up connection
using modems and the WPIM-SY.
The modem used in the first example is the FastPro II (GDC 060R124-000) from General
DataComm. The second example uses the Courier B.Everything from USRobotics (3COM). Any
brand modem meeting these requirements may be used. A typical configuration can be seen in
Figure D-1.
Figure D-1 Originate (Caller/Backup-side) Modem Configuration
TIP
To avoid incurring a cost due to possible unintentional call(s) do not connect the
modem line to the telephone wall jack until both the modem and the host platform
have been configured.
Telco Cloud
modem_backup
BACKUP
CONNECTION
BACKUP
CONNECTION
Telco Cloud
PRIMARY
CONNECTION
PRIMARY
CONNECTION
Host Platform #1
WPIM-SY
WPIM-SY
SITE #1
SITE #2
Modem
Modem
Host Platform #2
WPIM-SY
WPIM-SY