9XTend-PKG-U™ USB RF Modem User’s Guide
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4. RF Communication Modes
The network configurations covered in this chapter are described in terms of the following:
• Network Topology (Point-to-Point, Point-to-Multipoint or Peer-to-Peer)
• RF Communication Type (Basic or Acknowledged)
• RF Mode (Streaming, Multi-Transmit, Repeater, Acknowledged or Polling)
The following table provides a summary of the network configurations supported.
* Assume default values for parameters not listed. Profiles do not reflect addressing implementations.
** AM (Auto-set MY) Command must be issued through a terminal program such as the one incorporated in the
X-CTU 'Terminal' tab.
Table 4-01. Summary of network topologies supported by the XTend USB RF Modem
Point-to-Point
Definition An RF data link between two modems.
Sample Network Profile *
(Broadcast Communications)
Use default values for all modems.
Sample Network Profile *
(Acknowledged Communications)
All modems:
ATAM [auto-set MY (Source Address) parameter] **
ATDT FFFF [set Destination Address to 0xFFFF]
Basic RF Modes Streaming, Multi-Transmit, Repeater
Acknowledged RF Mode Acknowledged Mode
Point-to-Multipoint
Definition RF data links between one base and multiple remotes.
Sample Network Profile *
(Basic Communications)
Base:
ATMY 0 [set Source Address to 0x00]
ATDT FFFF [set Destination Address to 0xFFFF]
Remotes:
ATAM [auto-set MY (Source Address) parameter] **
ATDT 0 [set Destination Address to 0x00]
Sample Network Profile *
(Acknowledged Communications)
Base:
ATMY 0 [set Source Address to 0x00]
ATDT FFFF [set Destination Address to 0xFFFF]
ATRR 3 [set number of Retries to 3]
Remotes:
ATAM [auto-set MY (Source Address) parameter] **
ATDT 0 [set Destination Address to 0x00]
ATRR 3 [set number of Retries to 3]
Basic RF Modes Streaming, Multi-Transmit, Repeater, Polling
Acknowledged RF Modes Acknowledged, Polling
Peer-to-Peer
Definition
RF modems remain synchronized without use of master/server
dependencies. Each modem shares the roles of master and slave.
Digi's peer-to-peer architecture features fast synch times (35ms to
synchronize modems) and fast cold start times (50ms before
transmission).
Sample Network Profile *
(Basic Communications)
Use default values for all modems.
Sample Network Profile *
(Acknowledged Communications)
All modems:
ATAM [auto-set MY (Source Address) parameter] **
ATDT FFFF [set Destination Address to 0xFFFF]
ATRR 3 [set number of Retries to 3]
Basic RF Mode Streaming
Acknowledged RF Mode Acknowledged
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