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)： 90/164頁
文件大小： 1173K
代理商： PSB7110
_________________________________________________PSB 7110
Siemens Aktiengesellschaft
Page 90
90h:
Enable mailbox buffer empty indication (for transmitter)
If enabled, the ISAR will release a status event to the host as soon as the last data in
the mailbox buffer is transmitted and the host can set control bits after the last valid
data has been transmitted. The status event will only be released once for a buffer
empty condition, for a further state transition from "not empty " to "empty", the
indication has to be reenabled again (NOM=0).
Disable DTE control messages
A status change of the remote DTE is not indicated by status events (NOM=0).
However, the host can get status information by releasing a status request message
(see 3.7.1).
Enable DTE control messages (default after pump configuration)
Remote DTE status changes are indicated to the host by means of status events
(NOM=0).
A0h:
A1h:
For the V.110 commands "Set clamp to 0 / 1" (VCMD = 11h / 13h) data must not be entered
to the mailbox for transmission. If a clamp is set and continuous 0-bits or 1-bits are
transmitted, mailbox data will be discarded by the ISAR.
NOM ... Number of additional parameters in the mailbox
For some of the commands one additional parameter must be written to the mailbox .
The value 0 or 1 for each control bit is directly written to the corresponding bit position within the
frame:
X ... X-bit
SB ... S4-, S9-bit
SA1 ... S3-, S8-bit
SA0 ... S1-, S6-bit
E1-7 ... E1-, .. E7-bit
For the 600 bps data rate bit E7 is don't care in the message coding, but is controlled by the
pump for multiframe synchronisation.
FRC ... Frame Counter
Denotes the number of additional frames that must be received correctly in order to achieve
synchronism. As default (FRC=0), one V.110 frame must be received correctly to get
synchronised and e.g. if FRC=3, four frames are to be received correctly, before data is
transfered to the receive buffer.
3.6.2.5
Pump Control Command - DTMF (Host
→
ISAR)
No control commands are defined for DTMF mode.
To transmit DTMF tones, the pump has to be reconfigured to DTMF-transmission mode (PMOD =
110).
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