Appendix G – Wave Ware Interface Specifications - 23
The QQ value is followed by a comma character. This parameter should be monitored
if you intend to use software handshaking between your paging control software and
the paging transmitter. The paging transmitter Input Queue overflows if the QQ value
tries to exceed 14. As an example, with software handshaking, 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, described on the following pages.
D
Numeric character that indicates whether the carrier detect circuit in the paging
system 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
system has been programmed to avoid transmitting when a carrier signal has been
detected (see Programming Command below).
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>
(Hex code 04) is used to mark the end of a message
<NAK>
(Hex code 15) is used to indicate non-acknowledgment of a command from the PC.
<EE>
Two numeric characters that indicate the particular error that caused no
acknowledgment of a command from the PC. The possible error values are:
01 =
Invalid Message Type. Indicates a message type other than A, N, 1-4
was transmitted.
02 =
Invalid Data Rate. Indicates a data rate other than 5, 1, or 2 was
transmitted.
03 =
Invalid Capcode. Indicates an invalid capcode was transmitted.
Invalid capcodes are: 0-7, 2007664-2007671, 2045056-2045063,
.
04 =
Input Buffer Overflow. Indicates the serial data input buffer in the
paging system has overflowed. This condition would likely be caused
by the host system not recognizing the CTS signal.
05 =
Paging Buffer Overflow. Indicates the encoded paging message
output buffer in the paging system has overflowed. This condition
would likely be caused by excessive carrier signal detection while the
Carrier Detect mode was enabled.
