User`s guide

92 DC 900-1317J
ADCCP NRM Programmer’s Guide
Unformatted data cannot be exchanged in the information transfer state. If the client
attempts to send an Unformatted Data packet to the ICP while in this state, the ICP
responds with a
DLI_PROT_RESP_ERROR packet. Unformatted data can only be exchanged
while a station is in the initialization state (see Section 4.1.4), which is supported only if
ADCCP option 5 is selected.
A transition from the information transfer state to the initialization state occurs as a
result of the exchange of an SIM command and a UA response on the link or when the
client requests local station initialization. This change of state applies only to the speci-
fied station. The ICP initiates this change of state by sending a
DLI_PROT_RECV_STATION_INIT packet; the client does not respond, but immediately
changes to the initialization state. The client initiates this change of state by sending a
DLI_PROT_SEND_STATION_INIT packet; the ICP responds with the DLI_PROT_RECV_STATION_INIT
packet.
A transition from the information transfer state to the logically disconnected state
occurs as a result of the exchange of a DISC command and acknowledgment (UA or
DM) on the link. This state change applies only to the specified station. The ICP ini-
tiates this change of state by sending a
DLI_PROT_RESP_UNBIND_ACK packet specifying the
usProtXParms[0] field (station ID); the client does not respond, but immediately changes
to the logically disconnected state. The client initiates this state change by sending a
DLI_PROT_SEND_UNBIND packet specifying the usProtXParms[0] field (station ID). Once the
logical link is disconnected, the ICP responds with the
DLI_PROT_RESP_UNBIND_ACK packet
containing the same
usProtXParms[0] field (station ID).
If the client sends a DLI_PROT_SEND_UNBIND packet specifying the link ID and a zeroed
usProtXParms[0] field (station ID), the ICP forces all stations to the logically discon-
nected state, then disables the physical link. The ICP returns a
DLI_PROT_RESP_UNBIND_ACK packet identifying each active station it disconnects. When all
stations are disconnected, the ICP disables the physical link and returns a
DLI_PROT_RESP_UNBIND_ACK packet specifying the link ID and a zeroed usProtXParms[0]
field (station ID).