Selcall Decode Sequence; Notify Buffer Size - Tait TM8100 Protocol Manual

2.9.3

Selcall Decode Sequence

Description
Response
Effect
2.9.4

Notify Buffer Size

Description
TM8100/TM8200 Computer-Controlled Data Interface (CCDI) Protocol Manual
© Tait Electronics Limited April 2007
The radio sends this message every time the decoder tone buffer is emptied,
in accordance with the notification criteria set by the "I" command. See
"Set Selcall Parameters" on page 66
The sequences received are represented with the tones from the toneset.
Repeat tones and gaps will be forwarded as is.
Vssx...xcc
Where:
Parameter Value
V ASCII letter V denotes the Selcall decode message
ss ASCII hex number ss is the number of parameters
x...x are the tones decoded within the time window specified by the
notify parameters as follows:
■ ASCII digits 0 to 9
■ Special tones are represented with ASCII letters A to F
■ Gap. A gap in CCR is equal to the tone period set by the Selcall
Parameter command
cc ASCII hex number cc is the checksum
When the radio receives the given SELCALL sequence the radio sends the
decoded sequence to the DTE.
The number of tones to notify, set by the selcall parameter command, allow
the user to define the size of the decode tone buffer. This buffer sets the
maximum time period that the radio will decode and log tones before
reporting to the user, when continuously receiving valid selcall tones. The
timer is calculated as follows:
Tmax = (N x P) + P
Where:
Parameter Value
Tmax Notify buffer maximum time
N Number of tones
P Tone period
The buffer timer is started after at least one valid tone has been detected.
The buffer timer is reset if a gap is detected prior to expiry.
and "Notify Buffer Size" on page 73.
CCR 73