User's Manual

TS4000 Radio Modem User’s Manual AirNet Packet Protocol 28
Type Description
Data Packets These are any packets that carry user data. These include
data packets for all the different types of transfers (i.e.
Individual, Individual w/o ACK, Broadcast).
ACK Packets These are the acknowledgment packets for the individually
addressed data packets.
Relay Packets These are any packets that are relayed with the store and
forward relay option. Both data packets and ACK packets
can be relayed. These values are set on the Packet
General tab.
Control strings are used to control the operation of the modem. Status strings are
used to provide status information from the modem. Status strings from the
modem can be disabled if they are not needed for a given application. All control
and status strings begin with the ASCII string “+TS”, followed by specific ASCII
letters and numbers corresponding to the particular control field or status value
provided (See Appendix B - ASCII Character Set).
All numbers are formatted as ASCII digits and sent most significant digit first.
iii - Represents a three digit individual address.
gg - Represents a two digit group address.
nn - Represents a two digit packet number.
Control String Description
+TSI Set for individual transfer.
+TSIAiii Set for individual transfer with address change. The three
address characters change the individual destination
address.
+TSICggiii Set for individual transfer with complete address change.
The first two characters are for the group address and the
remaining three are for the individual destination address.
+TSN Set for individual without acknowledgment transfer.
+TSNAiii Set for individual without acknowledgment transfer with
address change. The three address characters change the
individual destination address.
+TSNCggiii Set for individual without acknowledgment transfer with
complete address change. The first two characters are for
the group address and the remaining three are for the
individual destination address.
+TSG Set for group broadcast transfer.
+TSGAgg Set for group broadcast transfer with address change. The
two address characters change the group destination
address.
+TSB Set for a network broadcast transfer (to all modems).
+TSFAggiii Change the modem destination address. The first two
address characters are for the group address and the
remaining three are for the individual address. The type of
transfer remains unchanged.
+TSSnn Set the packet number of the next packet transmitted.
Packet numbers are used in status strings to indicate the
success or failure of the transmission of a particular
Control and Status
Strings
Control Strings