FIRMWARE DESCRIPTION
Data Mode
2.10
•
19.01.2007
29
3.3.4.4.3 Incoming call, PT interface
A call request from a FT is signalled to the PT-side host by an activation of the DSRO signal.
If the PT is in DCE mode, the call request is also signalled by an activation of the RIIO output
signal (see SPECC command).
The host shall accept the call by activating the DTRI signal for at least 10ms. As soon as the
call is accepted, the RIIO output signal is deactivated for at least 10ms (DCE mode only, see
SPECC command).
3.3.4.4.4 Incoming call, FT interface
For incoming calls please use config mode commands SPDSI and SPDSD. If there are both
entries with SPDSI and SPDSD, the SPDSI entry is used.
On the activation of DTRI or after reset (dependent of DTRI and SPCC) to data mode the
RFP establishes a connection to the PT. At this time DTRI of the PT must be inactive, in
order to prevent a concurrent connection establishment initiated by the PT.
When the connection has been established DSRO of the PT goes to active state and the
host must respond by activating DTRI.
Example for calling PTs with SPDSI with FT as active part:
Step
Action
1
FT
enter config mode with ‘+-+’
2
FT
SPDSI EMC, DNR
3
FT
EXIT, DTRI is active
4
PT
DTRI is inactive
5
PT
when DSRO goes active activate DTRI
6
FT
when DSRO goes active connection is established
7
FT/PT
transmit data
8
FT
PT
go to step 1 for next connection
when DSRO goes inactive deactivate DTRI
9
FT
PT
after last PT deactivate DTRI
when DSRO goes inactive deactivate DTRI