Appendix A – TAP Interface Specifications - 13
If your
WaveWare Paging System
is configured to operate using TAP Non-Verbose mode, the paging
system will respond only with an initial response code of:
211<CR>
Following the first part of the TAP message block response, if the input buffer of the paging system has
capacity for another TAP message block, the paging system will send the following message.
<ACK><CR>
The <ACK><CR> response can be used as a flow control method to prevent overflow and lost messages.
As alternative flow control methods, you can use either hardware or software flow control. If the paging
system DIP switch is set to hardware flow control mode, the RS-232 CTS signal will be deasserted when
the input buffer doesn’t have capacity for another TAP message block, and reasserted when capacity exists
in the input buffer. If the DIP switch is set to software flow control mode, an XOFF character (0x11) will
be output in the response string to indicate the the input buffer doesn't have capacity for another TAP
message block. When capacity is available, an XON character (0x13) will be output.
When the Host Device delivers a TAP Message Block and a checksum error occurs, the paging system will
respond with an error message and a <NAK><CR>, which tells the Host Device to resend the transaction.
See Appendix E – TAP Response Codes for more information on paging system response messages. If the
TAP Message Block checksum is OK, but the Message Block violates formatting rules, the paging system
will respond with an error message and an <RS><CR>, which tells the Host Device to abandon the
transaction. An example error message sequence follows:
514 Checksum Error – Exp. 2:9 Got 2:X<CR>
<NAK><CR>
PAGING SESSION LOGOUT
The Paging Session Logout mode allows a Host Device, sometimes called a Remote Entry Device, to stop
communications with the paging system. With the
WaveWare Paging System
, the Logout process is
optional. The
WaveWare Paging System
will automatically login a Host Device and process the paging
message if it recognizes a properly formatted TAP message block at any point in it’s operation.
To initiate a logout (disconnect sequence) the Host Device should send the following to the paging system:
<EOT><CR>
Upon recognizing a logout command, the paging system will respond with:
PAGING EXCHANGE DISCONNECT<CR><ESC><EOT><CR>
