ZETRON 748, Technical Manual

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Operation
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timers are disabled. This prefix is always allowed for any level of user toll restriction which allows
manual dialing.
Toll Free Prefix
The Model 748 supports two user defined Toll free Prefix codes. A toll free prefix is a 4 digit prefix
that will always be considered a local call. The default prefixes are “0800” and “0500”. These can be
disabled by clearing the prefix string in programming. These prefixes are always allowed for any
level of user toll restriction which allows manual dialing.
PSTN Feature Code
When the phone line is first taken off hook for a mobile to phone call, the Model 748 can send a pre-
defined string of DTMF before any other digits are dialed by the mobile. This is typically used to
disable Call waiting or Caller ID function. The PSTN Feature Code string can be up to nine digits
long using any valid DTMF digit including pauses “,”. This string can be disabled by clearing the
string in programming (default). This string will be dialed after the first digit is received from the
mobile before any other digits are dialed. The string will always be sent, but only once at the
beginning of the call.
RA-222
Support for RA-222 compliance is provided in the Model 748. This is a fixed two minute re-dial
barrier. It prevents the same number from being dialed a second time for two minutes after the end
of the call. This is a system wide setting and affects all users equally. This can be enabled or
disabled with DTMF command 149. The default setting is 0 or disabled.