US Robotics 56K USB Modem User Manual page 68

+FDT—Data Transmission Request
A +FDT command from DTE requests the DCE to transmit a Phase C page. This command is issued at the
beginning of every page. If DCE receives command during Phase B, it proceeds with negotiation and
releases the DCS message to the remote facsimile. The syntax of the response is as follows:
+FDT<CR>
Result codes:
• ERROR if DCE is onhook.
+FET—Post Page Message (ppm) Response
The +FET:<ppm> response is sent by a receiving facsimile DCE once it receives the post page message
from the transmitting facsimile. The post page message codes are shown below.
Result codes:
• NA
Table 138. PPM Codes
PPM Code
0 Another page next, same document (MPS).
1 Another document next (EOM).
2 No more pages or documents (EOP).
3 Another page next, same document, procedure interrupt requested (PRI-MPS).
4 Another document next, procedure interrupt requested (PRI-EOM).
5 No more pages or documents, procedure interrupt requested (PRI-EOP).
+FHS—Call Termination Status Indicator
+FHS:<hsc> indicates that the call has been terminated and the hangup status cause (hsc) is reported and
saved. Table 139 shows valid HSC codes. HSC codes are two-digit hexadecimal values.
Result codes:
• NA
Table 139. HSC Codes
HSC Code
00-0F
00
01
02
03
04
05
10—1F
10
11
20—3F
Description (T.30 Mnemonic in Parentheses)
Hangup Cause Description
Call placement and termination
Normal and proper end of connection
Ring detect without successful handshake
Call aborted, from +FKS or <CAN>
No loop current
Ringback detected, no answer (time-out)
Ringback detected, answer without CED
Transmit Phase A and miscellaneous errors
Unspecified Phase A error
No answer (T.30 T1 time-out)
Transmit Phase B hangup codes
56K USB Modem
User Guide
Command Reference - 62