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Appendix NHayes Modem AT Command Protocol
408
Password Verification Operation
The number of retries is 3 for password verification.
PC
Personal computer
(remote exchange)
Password verification
(starting #552)
Dispatching
character string
(Retry up to 3 times)
Receiving
password
Verifying
password
Verification
result
Terminating
process
Password
Receiving character
string
Issuing password
“Password: ”
When Instruction
Execution Flag
(SR 28908 or
SR 28913) turns
ON.
Data Send/Receive
Data Send/Receive can be executed using sequence No. 553. The send data sent to another exchange is set in
the words specified by the second operand of PMCR. Data received by the PC is stored in the words specified by
the third operand of PMCR.
Operand and Word Settings of PMCR
Operand 1 #x553 (x: Communications port)
Operand 2 First address C1 of the words where send data is set
Operand 3 First address C2 of the words where receive data is stored
• Operand 2
C1+0 Number of words from address set for operand 2 to end of
data
4 digits BCD
C1+1 Number of bytes of send data 4 digits BCD
C1+2
:
C1+n
Send data (dialling operation)
(Fill data to left for odd numbers of bytes)
ASCII
• Operand 3
C2+0 Number of bytes of receive data 4 digits BCD
C2+1
:
C2+n
Receive data (dialling operation)
(Fill data to left for odd numbers of bytes)
ASCII