ZETRON 748, Technical Manual

Page: 176 / 259

Feature Set Reference
162 025-9368H
See also Interconnect Start time - Stop time and Interconnect Allowed days / Restricted days earlier
in this section.
Selcall Capcode
The Model 748 Selcall and Roamer versions include the ability to perform selective calling using
analog tone signaling formats. The Model 748 supports DTMF, DTMF-t, Two-tone and Five-tone
selective calling formats. Each is different and each requires a different type of decoder. You may
use more than one format in the system (some users could have Two-tone while others have DTMF).
The
Selcall capcode indicates to the Model 748 what sequence of tones is sent to call a particular
user. The type of signaling is set with the Selcall format command (DTMF, DTMF-t, Two-tone,
Five-tone).
Application note:
Selcall format must be set before you can program the Selcall capcode .
DTMF Signaling
DTMF call codes are entered just the way they are to be sent. For example, to send “12345”, simply
enter “12345” into the call code. The signaling speed is programmed in the Mobile System menu
using
DTMF on time and DTMF off time . The default is 10 digits per second.
DTMF-t Signaling
DTMF-t is a form of DTMF signaling compatible with most older forms of scan based DTMF
trunking. This type of format has Collect digit to “wake up” decoders and a Reset digit to put
decoders “to sleep”. The Reset digit is set in the Mobile System menu. The signaling speed is
programmed in the Mobile System menu using
DTMF on time and DTMF off time . The duration of
the Reset and Collect digits is also set in the Mobile System menu. The Collect digit is part of the
Selcall capcode (the first digit of the capcode) when using this format. The default settings for this
format are:
DTMF-t Reset time : 1000msecs
DTMF-t Collect time : 2500msecs
DTMF-t Reset digit : A
If a mobile has an decoder address of 1234, and the system is using a Collect digit of “D”, the Selcall
capcode would be “D1234”. When a phone to mobile call is placed to our example user, the page
would be:
phone-to-mobile call placed to our example user:
mobile-to-mobile call placed to our example user:
A D D 1 2 3 4
D D 1 2 3 4
On disconnect, the Reset digit will be sent to reset all the decoders on the channel. The Reset digit
will be sent also if the user receives a phone-to-mobile call, on disconnect of the call.
conversation
A