參數(shù)資料
型號: PSB7110
廠商: SIEMENS AG
英文描述: Enhanced ISDN Data Access Controller ISAR
中文描述: 增強綜合業(yè)務(wù)數(shù)字網(wǎng)的數(shù)據(jù)接入控制器專家組
文件頁數(shù): 138/164頁
文件大小: 1173K
代理商: PSB7110
_________________________________________________PSB 7110
Siemens Aktiengesellschaft
Page 138
3.11.5
HDLC Transmission
A host can control HDLC frame transmission during a fax group 3 session by issuing the command
CMD_FTH to the fax pump. HDLC transmission is specified by the T.30 procedure during the
exchange of control information. Some applications may alternatively implement HDLC framing
directly, they would then use binary transmission for the transmission of their HDLC bit stream.
AT+FTH=<MOD>
Generate Command
CMD_FTH
(set parameter <MOD>)
Event
LINE_TX_HDLC
Generate Command
CMD_CONTINUE
Event
RSP_CONNECT
No
Yes
No
Yes
Issue
"CONNECT"
E
<DLE><ETX>
seen
5 sec timeout
expired
B
No
Yes
No
Yes
Yes
No
Data available
from DTE
Transfer data to fax pump
Mask FRAME_START onto 1st byte
Mask FRAME_END onto last byte
Last databyte
sent
B
No
Yes
No
Yes
Yes
No
<DLE><ETX>
seen
Final frame
E
Figure 22 HDLC transmission
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