User's Manual

29
Document Number: 0100SM1401 Issue: 10-14
Connectivity
Embedded Serial Device Server
A serial device server can perform two tasks: encapsulate serial data within IP headers to allow transportation of the serial
data over a LAN/WAN, or take IP encapsulated serial data, strip off the IP headers and output the raw serial data. Normally,
systems require a standalone device server to integrate external serial devices at remotes sites into a managed LAN/WAN.
Q data radios provide the functionality of two embedded device servers which avoids the requirement for an external device
server. The example below shows a traditional IP radio, Ethernet to serial topology, using an external device server.
In a system that requires a serial connection to a remote end device and an Ethernet connection at the Host application end,
the device server should be enabled within the remote radio. When the embedded device server is enabled, the remote radio
provides the same functionality as if there was an external device server at the remote site. This functionality is also available
in a PTMP system.
Device Server mode provides an easily configurable mechanism for transporting serial traffic that does not have any built-in
addressing. The benefit of the device server feature is that device addressing can be performed using IP addresses for non-
addressable serial protocols, without the need for external terminal servers or managing serial devices using the IP address of
the remote radio.
Features of the embedded serial device server include:
•Support for two independent fully configurable serial device servers.
•Support for three transport protocols: TCP, UDP and PPP.
•Support for three modes of TCP operation: Client mode, Server mode and Client/Server mode.
•User-configurable port numbers.
•Support for up to 4 simultaneous TCP connections when operating in server mode.
The diagram below shows a typical setup using the device server functionality in remote radios.
Part D – Feature Detail