Laird ConnexLink CL2510, User Manual

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CL2510
RF Transceiver
In this example, client radios (because of Auto Destination and Auto Channel) will be able to synchronize
with either Server radio. Message communication from the central server will be broadcast out to all clients,
including those connected to the repeater server. Messages from the clients will be sent back addressed to
the central server.
Limitations:
There are some limitations to this setup.
• The addition of the repeaters requires two additional radios which increases the cost of the systems.
• The repeater setup of a client and server must be powered sufficiently.
• The antennas of the client and the server in the repeater should be positioned to minimize interference.
For best performance the antennas should be placed more than 10ft from each other.
• There is no way to know if a client is attached to the central server or the repeater server without some
additional AT commands, this makes it difficult to perform addressed mode from the central server.
• There is no way to tell from the RF packet the clients MAC address when a message is received at the
central server, this is because all messages through the repeater will have the repeater client’s MAC address.
• The OEM must add their own layer of addressing into the data stream to address packets.
• There is some additional latency associated with the repeater; this latency is between 20 and 40ms typically.
Server
Central Computer
Client
Client
Client Server
Client
Client
Client
Repeater module
consisting of two
Radios
OTHER NETWORK TOPOLOgIES
Repeater networks
Though there is no functionality for a node to automatically forward a message along to another radio,
repeater networks can be setup through the addition of a second Server to provide for additional coverage.
This example of a repeater network would still be useful for a point-to-multipoint network where some of the
nodes are not in range of the primary access point.
In this network topology a CL2510 is setup as a Server to act as the primary access point. All other radios are
configured as clients with auto-channel and auto-destination configured. Each client in range will then receive
every message from the server radio and will respond back with an addressed message to the server. To cover
additional areas, a repeater consisting of two CL2510s connected via a Null Modem cable can be added to
the network. The repeater would consist of one radio set up as a client to the central computer server and
configured identical to the other clients and one radio configured as a server in broadcast mode. Each repeater
server should be on its own RF Channel. Any client radios in range of this new repeater will synchronize to it.
All radios in the network should share the same System ID.
FIgURE: CL2510 NETWORK WITH REPEATER
THEORY OF
OPERATION