Control Microsystems 5901 - AT+ Command Set; A8 E=A,B,C,D,E,F - V.8 and V.8 Bis Operation Controls

5901 High Speed Dialup Modem Hardware Manual
October 19, 2007
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Result Codes:
OK For n <= 3, and x <= 31 digits.
ERROR If n > 3, x > 31 digits, or if NVRAM is not installed or is not operational.
10.4 AT+ Command Set
10.4.1 +A8E=a,b,c,d,e,f - V.8 and V.8bis Operation Controls
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).
This command is a compound parameter 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, regardless of the state of the +FCLASS parameter.
This command is an action command 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: +A8E=a,b,c[,d][,e][,f]
a Decimal number which enables/disables issuance of +A8 x indications during modem-
controlled V.8 origination negotiation.
1 Enable DCE-controlled V.8 origination negotiation without +A8x indications. (Default.)
6 Enable DCE-controlled V.8 origination negotiation with +A8x indications.
b Decimal number which enables/disables issuance of +A8 x indications during modem-
controlled V.8 answer negotiation.
1 Enable DCE-controlled V.8 answer negotiation without +A8x indications. (Default.)
5 Enable DCE-controlled V.8 answer negotiation with +A8x indications.
C Set the V.8 CI signal call function to the hexadecimal octet XY.
0 (Default.)
21
C1
d Decimal number which enables/disables V.8bis negotiation.
0 Disable V.8bis negotiation.
1 Enable V.8bis negotiation. (Default.)
e “<string of values>“. Applicable only for <v8a>=5. Not supported.
f “<string of values>“. Applicable only for <v8a>=5. Not supported.
Default values: 1,1,00,1,0,0
The ATD and ATA commands behave as specified in V.250, and +A8n indications are not
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.