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Micro House PC Hardware Library Volume II: Network Interface Cards And Modems Micro House PC Hardware Library Volume II: Network Interface Cards And Modems
by Micro House International, Inc. and Scott Mueller
Que, Macmillan Computer Publishing
ISBN: 078971664x   Pub Date: 06/17/98
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V.21 - HANDSHAKE TIME
Type: Register
Format: AT [cmds] S29=n [cmds]
Default: 20
Range: 0-255
Unit: .1 second
Description: Sets length of V.21 handshake

V.32 - HANDSHAKE TIME
Type: Register
Format: AT [cmds] S28=n [cmds]
Default: 8
Range: 0-255
Unit: .1 second
Description: Sets length of V.32 handshake

V.25bis Command Set

CONNECT INCOMING CALLS
Type: Immediate
Format: CIC
Description: Instructs the modem to answer an incoming call; if no call is currently incoming, a result of INV will be returned.

CALL REQUESTED NUMBER
Type: Immediate
Format: CRN<#>
Description: Dials the number given; it will ignore spaces and hyphens in the string.

CALL REQUEST WITH ADDRESS
Type: Immediate
Format: CRSn
Description: Dials the number stored in NVRAM location n

DISREGARD INCOMING CALL
Type: Immediate
Format: DIC
Description: Instructs the modem to ignore the incoming call, if the modem is set to automatically answer; if no call is currently incoming, a result of INV will be returned.

PROGRAM NUMBER
Type: Configuration
Format: PRNn
Description: Stores a phone number in memory address n.

REQUEST LIST OF FORBIDDEN NUMBERS
Type: Immediate
Format: RFN
Description: Requests the list of forbidden numbers from the modem; the modem is unable to dial numbers on this list until its power has been cycled; if this feature is not enabled, the modem will return INV.

REQUEST LISTED NUMBERS
Type: Immediate
Format: RLN
Description: Requests the modem to return the list of stored numbers in NVRAM; if no numbers are stored, the modem will return LSN.

V.25bis Result codes

CALL FAILURE INDICATOR
Type: Response
Format: CFIxx
Description: Indicates that the attempt to connect failed
Response Name Description
CFAB Abort The call was aborted because either no dialtone was detected or a character was received from the host computer.
CFCB DCE Busy An incoming call was detected after the dialing command was issued
CFET Engaged Tone A busy signal was detected
CFFC Forbidden Call The number given is on the forbidden list
CFNS Not Stored The memory address given did not contain a valid telephone number
CFNT No Tone The remote party did not issue a response tone
CFRT Ring Tone A responding tone was detected, but the call timed out before it was completed.

CONNECTION
Type: Response
Format: CNX
Description: A connection has been successfully established

LIST OF NUMBERS
Type: Response
Format: LS
Description: This code is given in response to a number just dialed

LIST OF STORED NUMBERS
Type: Response
Format: LSN
Description: This code is given in response to a RLN command

LIST OF STORED FORBIDDEN NUMBERS
Type: Response
Format: LSF
Description: This code is given in response to a RFN command; it indicates that the number is on the forbidden list and cannot be dialed.

INCOMING CALL
Type: Response
Format: INC
Description: An incoming call has been detected

INVALID
Type: Response
Format: INV
Description: The modem was issued an improper command, optional parameters maybe displayed. Response Description
Response Description
INVMS Message syntax error
INVCU Unknown command
INVPS Parameter syntax error
INVPV Parameter value error

VALID
Type: Response
Format: VAL
Description: The command issued is valid and is being executed


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