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15–13
Extended Fax AT Commands
These commands are unique to the ZyXEL modems. The computer controls the
modem through a set of extended fax AT commands and the modem responds with
a set of status report result codes. During the data state, compressed fax image data
is flowing between the modem and the computer. The default serial connection
speed is 38400 bps and it is higher than the fax link rate. CTS/RTS hardware flow
control is used to regulate the data flow.
+FNC:
"
NSC
FIF
string
"
Reports NSC (Non-Standard Commands)
frame
+FNF:
"
NSF
FIF
string
"
Reports NSF (Non-Standard Facilities) frame.
+FNS:
"NSS FIF string"
Reports NSF (Non-Standard Setup) frame.
+FPI:
"
CIG
ID
string
"
Reports remote ID-response-Polling Station ID
(CIG).
+FPO Remote polling indication.
+FPS:ppr, lc, blc,
cblc, lbc
T.30 phase C page reception response:
ppr=1 Received page is good.
ppr=2 Page is bad; retrain is requested.
ppr=3 Page is good; retrain is requested.
ppr=4 Page is good; remote request for procedure
interrupt is accepted.
ppr=5 Page is bad; retrain is requested; remote
request for procedure interrupt is accepted.
The receiving DCE may count <lc>, <blc>,
<cblc> and <lbc> due to DCE buffer overflow
and report them:
lc: line count
blc: bad line count
cblc: maximum consecutive bad line count
lbc: lost byte count
+FTC: vr, br, wd, ln,
df, ec, bf, st
Remote fax station capabilities (DCT frame infor-
mation) response: refer to the +FIS=... command
for the description of subparameters.
+FTI:
"
TSI ID string
"
Remote ID response-Transmit Station ID (TSI).
+FVO Report transition to voice.