V.92 DIALUP 2-WIRE OR 4-WIRE LEASED-LINE DATA/FAX MODEM AT COMMANDS GUIDE
34
3. V.8/V.8bis Commands
V.8 is a way V.34 modems negotiate connections features and options. V.8bis is a start-up sequence for
multimedia modems.
Command:
+A8E
V.8 and V.8bis Operation Controls
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 (for example, V.8bis, V.18,
V.32bis Annex A). It 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.
Example:
If initial V.8 negotiation fails, but subsequent T.30 negotiation
indicates V.8 capability, this command may be used to initiate V.8
negotiation.
Syntax: +A8E=<v8o>,<v8a>,<v8cf>[,<v8b>][,<cfrange>][,<protrange>]
Values:
<v8o> Decimal number which enables/disables issuance of +A8x
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.
<v8a>= Decimal number which enables/disables issuance of
+A8x indications during modem-controlled V.8 answer
negotiation.
1
Enable DCE-controlled V.8 answer negotiation wA8x
indications. Default
5
Enable DCE-controlled V.8 answer negotiation with +A8x
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. Default
<cfrange>= “<string of values>.” Applicable only for <v8a>=5. Not
supported.
<protrange>= “<string of values>.” Applicable only for <v8a>=5. Not
supported.
Summary of Contents for MD1650A-JP
Page 2: ......
