Telenetics 56 - Manual (Page 160)

AT Commands
Page 152
<EOP frame data>
<DLE><ETX> CONNECT
OK send EOP frame
send FCS
drop carrier receives EOP
final frame
AT+FRH=3
CONNECT
<MCF frame
data>
<DLE><ETX>
OK
detect carrier
detect flags
get MCF frame
check FCS
accept FCS send V.21
carrier
send flags
get MCF frame
send FCS
Final frame bit set.
frame OK
AT+FRH=3 NO CARRIER detect loss-of-carrier drop carrier
AT+FRH=3
<DNC frame>
<DLE><ETX>
CONNECT
OK send V.21 carrier
send flags
send DNC frame
send FCS
drop carrier
detect carrier
detect flags
receive DC|NC
final frame
ATH0 OK hang up hang up
Table A-21. Fax Class 1 Answering Sequence (Receiving a Single Page)
DTE Commands
Modem
Responses Local Modem Action
Remote Station
Action Notes
AT+FCLASS=1 OK Set Class 1
RING<- detect ringing dials [,send
CNG]
ATA
<CSI frame data>
<DLE><ETX>
<DIS frame data>
<DLE><ETX>
CONNECT
CONNECT
OK off-hook,
send CED,
send V.21 carrier send
flags
send CSI frame send
FCS
send flags
send DIS data
send FCS and flags
drop carrier
get CED,
detect carrier
detect flags
receive CSI
get FCS
get flags
get DIS
get flags AT+FRH=3
implied by answering with
+FCLASS=1.0.
not final frame
final frame
AT+FRH=3
CONNECT
<TSI frame data>
<DLE><ETX>
OK
detect carrier detect
flags
receive TSI
receive FCS
accept FCS send V.21
carrier send
flags
send TSI frame
send FCS
frame OK
AT+FRH=3
CONNECT
<DCS frame data>
<DLE><ETX>
OK
receive DCS receive
FCS
accept FCS
send DCS frame
send FCS
final frame bit set
frame OK
AT+FRH=3 NO CARRIER detect loss-of-carrier drop carrier DTE did not check final
frame bit and issued
+FRH=3
AT+FTM=96
CONNECT
<TCF data>
<DLE><ETX>
OK
detect carrier
receive TCF
detect loss-of-carrier wait 75 ms
send V.29
carrier send TCF
data drop carrier
AT+FRH=3
<CFR frame data>
<DLE><ETX>
CONNECT
OK send V.21 carrier
send flags
get CRF frame
send FCS
drop carrier detect carrier
detect flags
receive CFR
final frame
AT+FTM=96
CONNECT
<page image data>
<DLE><ETX>
detect carrier receive
page
detect loss-of-carrier
send V.29
carrier send
page data drop