Message:
If commands are issued properly, you can execute
ATA actions (manual answering), and you will
receive a CNX response. If the proper commands
were not issued, you will receive an INV (failure)
response.
2.) CRN (Call Request with Number)
Definition: Dial command like ATD.
Limits: None.
Message:
If a failure occurs while executing CRN commands,
the following responses will be issued:
CONDITION RESPONSE
1. DTR
Off
INV
2. Parameter
Error
INVPV
3. No Dial Tone
CFIAB
4. No
Carrier
CFIRT
5. No
Answer
CFINT
6. Busy
CFIET
For example:
Command and Response Status Instruction
1. CRN2577125
DTR Off
Dial
INV
DTR is off
2. CRN257AB25
Telephone number:
INVPV
only 0-9, w, , , >, P,
T, !, and spaces.
3. CRN2577125
Busy
Dial
CFIET
Busy
3.) CRS (Call Request with Memory Address)
Definition: Like command ATDS.
Limits: None.
Message:
Same as CRN.
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