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<SOH><NAK>EE<EOT>
The NAK response is sent to the host device immediately following a command if errors occur.
<SOH>
– used to mark the start of a message.
<ACK>
– used to indicate acknowledgement of valid reception of a command from the host system.
V…V
– Alphanumeric string that indicates the version number of the firmware in the paging encoder. The
version number is followed by a comma character.
– A one to two numeric character string that indicates the quantity of paging messages that have been
received by the paging encoder and not yet transmitted (Input Queue).
This parameter should be monitored if you intend to use software handshaking between your paging
control software and the paging encoder. The paging encoder Input Queue overflows if the QQ value tries to
exceed 14.
Your software should stop sending data at a QQ value of 12 and resume sending data when the
QQ value reaches 10 or less.
You can query the size of the Input Queue by submitting a Status Command.
D
– Numeric character that indicates whether the carrier detect circuit in the paging encoder is currently
detecting a carrier signal or not. Valid values are:
0 = CARRIER SIGNAL NOT DETECTED / 1 = CARRIER SIGNAL DETECTED
Note:
The carrier detect signal status is passed to the PC whether or not the paging encoder has been
programmed to avoid transmitting when a carrier signal has been.
C
– A single numeric value used to indicate the On/Off state of the Carrier Detect mode. The numeric
character is followed by a comma.
Valid values (
C
) are:
0 = OFF / 1 = ON
II
– A two hexadecimal digit value that is reserved for future use.
<EOT>
– used to mark the end of a message
<NAK>
– used to indicate non-acknowledgment of a command from the host system.
<EE>
– Two numeric characters that indicate the particular error that caused no acknowledgment of a
command from the host system.
