Hardware manual

5901 High Speed Dialup Modem Hardware Manual

October 19, 2007

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.)

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.