TS4000 Radio Modem User’s Manual
AirNet Packet Protocol
37
This field selects the type of transfer that the modem defaults to at power up.
This will remain as the transfer type until it is switched using the appropriate
control string.
Default Transfer
Selection Description
Individual Transfer
This is a standard point to point data transfer with
acknowledgments.
Individual Transfer
w/o Acknowledge
This is a point to point data transfer but without any
acknowledgments. This implies that there are no transmit
retries if the packet is received with errors.
Group Broadcast
This is a broadcast to a group of modems. Receiving
modems will accept two types of group broadcasts.
Group broadcasts - Broadcasts where the destination
group matches the receiving modem's group.
Multicast broadcasts - Broadcasts where the
destination group matches a group from the receive
modem's multicast group list. For these broadcasts to
be received, the receiving modem must have multicast
reception enabled.
Network
Broadcast
This is a broadcast to all modems.
These fields select the default destination address that the modem defaults to at
power up. This address will remain as the default until it is switched using the
appropriate control strings.
Default Destination
Address
Type Description
Individual Address
The default destination individual address.
Group Address
The default destination group address.
Control Description
Provide Address
at Receiver
When this control is activated, the source address of each
received packet is sent as a prefix status string to the data
(see Control and Status Strings).
Provide Positive
Transmit ACKs
When this control is activated, a status string is sent to the
user when an acknowledgment is received for a packet.
The corresponding packet number of the packet will be
provided as part of the status string (see Control and Status
Strings). This does not apply to any type of broadcast
transfer or individual transfers without acknowledgment.
Provide Negative
Transmit ACKs
When this control is activated, a status string is sent to the
user when the transfer of a packet is unsuccessful (all
retries have been sent and no acknowledgment has been
received). The corresponding packet number of the packet
will be provided as part of the status string (see Control and
Status Strings). This does not apply to any type of
broadcast transfer or individual transfers without
acknowledgment.
Packet Status Data
