Sierra Wireless MP 875 - Manual (Page 16)

MP875 Modem User Guide
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The MP modem VSPs are available on both USB and Ethernet
interfaces. For information on enabling a virtual serial port, see
the MP 3G Modems AT Command Reference manual (document
#2130810).
VPN support for RNAP
This feature allows for the exchange of Remote Network
Access Protocol (RNAP
1
) data between the MP modem and a
remote server accessible only through a Virtual Private
Network (VPN) connection. When using this feature, you must
have 3G Watcher running on the computer.
The MP modem sends RNAP data over Ethernet or USB to 3G
Watcher on the computer. 3G Watcher places the RNAP data in
a User Datagram Protocol/Internet Protocol (UDP/IP) packet
and sends it over the VPN connection to the server. When 3G
Watcher receives a UDP/IP packet containing RNAP data over
the VPN connection, it disassembles the packet and sends the
RNAP data to the MP modem.
You can enable this option using 3G Watcher software or AT
commands. See the 3G Watcher online help and the MP 3G
Modems AT Command Reference manual (document #2130810)
for details.
Software
The MP modem comes with the following software:
• 3G Watcher, the software for the MP modem which allows
you to manage and monitor your connections.
• The driver that forms the interface between the MP
modem and your Windows operating system.
• The firmware that is stored in non‐volatile memory.
The MP modem has an embedded radio module (a
Mini Card 8775), also made by Sierra Wireless, Inc. There
are two firmware programs on the MP modem—one
stored on the controller board of the MP modem and one
on the radio module.
The firmware was loaded into the radio module and con‐
troller board when the MP modem was assembled. As new
1. RNAP is a Sierra Wireless proprietary protocol that encapsu-
lates the MTP data that is sent to and from the MP modem. It
ensures that both the MP modem and remote host recognize
the data packets. See The Monitoring and Tracking Protocol
Guide on page 18.