Multi-Tech Systems MTS2SA-T ユーザーズマニュアル
Chapter 10
− Modem Mode AT Commands, S-Registers, and Result Codes
Multi-Tech Systems, Inc. MultiConnect Serial-to-Serial Adapter User Guide (S000354A)
100
Command:
%Ln
Line Signal Level Report
Returns a value, which indicates the received signal level. The value returned is a direct
indication (DAA dependent) of the receive level at the MDP, not at the telephone line
connector. For example, 009 = -9 dBm, 043 = -43 dBm, and so on.
Returns a value, which indicates the received signal level. The value returned is a direct
indication (DAA dependent) of the receive level at the MDP, not at the telephone line
connector. For example, 009 = -9 dBm, 043 = -43 dBm, and so on.
Command:
%Qn
Line Signal Quality Report
Reports the line signal quality (DAA dependent). Returns the higher order byte of the EQM
value. Based on the EQM value, retrain or fallback/fall forward may be initiated if enabled by
%E1 or %E2.
Example:
Reports the line signal quality (DAA dependent). Returns the higher order byte of the EQM
value. Based on the EQM value, retrain or fallback/fall forward may be initiated if enabled by
%E1 or %E2.
Example:
AT%Q
015
015
Command:
%Un
Select µ-Law or A-Law Codec Type
(Not available in V.22bis)
Values: 0,
1
Default:
Country-specific
Description
This command selects µ-Law or A-Law codec type for V.90 and K56flex modulation. This
command also stores the selected setting directly to NVRAM. The default value is country
specific.
%U0 Selects µ-Law.
%U1 Selects A-Law.
command also stores the selected setting directly to NVRAM. The default value is country
specific.
%U0 Selects µ-Law.
%U1 Selects A-Law.
Command:
+A8E
V.8 and V.8bis Operation Controls
(Not available in V.22bis)
Values:
1,
6
Default:
1
Description:
This command is defined for two conditions: as a parameter while the modem is on-hook,
and as an action command while the modem is off-hook. If enabled, V.8 negotiation does
not preclude simultaneous implementation of other negotiation means (e.g., V.8bis, V.18,
V.32bis Annex A).
and as an action command while the modem is off-hook. If enabled, V.8 negotiation does
not preclude simultaneous implementation of other negotiation means (e.g., V.8bis, V.18,
V.32bis Annex A).
On-Hook
If issued while the modem is on-hook, used to precondition V.8 and V.8bis originating and
answering operation. It is issued by the DTE before the Dial (D) or Answer (A) command.
answering operation. It is issued by the DTE before the Dial (D) or Answer (A) command.
Off-Hook
If issued while the modem is off-hook, to (re)start V.8 or V.8bis negotiation. For example, if
initial V.8 negotiation failed, but subsequent T.30 negotiation indicated V.8 capability, this
command may be used to initiate V.8 negotiation.
command may be used to initiate V.8 negotiation.
<v8o>=
Decimal number which enables/disables issuance of +A8x indications during
modem-controlled V.8 origination negotiation.
modem-controlled V.8 origination negotiation.
1
Enable DCE-controlled V.8 origination negotiation without +A8x
indications.
indications.
6
Enable DCE-controlled V.8 origination negotiation with +A8x
indications.
indications.
<v8a>=
Decimal number which enables/disables issuance of +A8x indications during
modem-controlled V.8 answer negotiation.
modem-controlled V.8 answer negotiation.
1
Enable DCE-controlled V.8 answer negotiation without +A8x
indications.
indications.
5
Enable DCE-controlled V.8 answer negotiation with +A8x
indications.
indications.
<v8cf>=
Set the V.8 CI signal call function to the hexadecimal octet XY.
00
(Default)
21
C1
<v8b>=
Decimal number which enables/disables V.8bis negotiation.
0
Disable V.8bis negotiation.
1
Enable V.8bis negotiation.
The ATD and ATA commands behave as specified in V.250, and +A8n indications are not
generated by the modem.
generated by the modem.
For subparameter values <v8o>=6 and <v8a>=5, the +A8I indications are issued during the
course of the V.8 session to notify the DTE when the relevant V.8 signals are received.
course of the V.8 session to notify the DTE when the relevant V.8 signals are received.
Reporting Current or Selected Values
Command: +A8E?
Reporting Supported Range of Parameter Values
Command: +A8E=?
Command: +A8E?
Reporting Supported Range of Parameter Values
Command: +A8E=?