wd9cms
Member
Has anyone figured out how to send DTMF A,B,C, and D using a Motorola APX handheld or mobile radio?
Thanks,
Bill
Thanks,
Bill
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APX DTMF A-D
- Thread starter wd9cms
- Start date
MTS2000des
5B2_BEE00 Czar
Not possible. Unless you use an external DTMF encoder on your mike or via J2 connector
K2NEC
Member
- Joined
- Oct 23, 2017
- Messages
- 2,664
XPR-7550e DTMF
Does the 7550e have the capability to program A, B, C and D to DTMF?
Does anybody even use those anymore? I don't think there's a single running autopatch still connected to any repeaters in my area. With everybody and his little kids ALL having cell phones these days, an autopatch is quite an obsolete relic of the past these days.
wd9cms
Member
Thanks MTS2000des! Has anyone successfully interfaced an external DTMF pad to a APX radio??? They are still used or remote control and telemetry applications.
Two words: S-COM 7330
Off hand I can think of at least three repeaters with autopatch in my area. They do get used from time to time, obviously not as much as they used to though.
Two of my repeaters have controllers capable of autopatch, but I haven't bothered to go down that road, even though I've got phone line access and could do it.
To the OP: It's much easier to do with a mobile; all you need to do is connect the audio out of your DTMF pad to the ground and aux mike pins (and PTT if the DTMF pad has that capability) of the accessory port on the back of the radio. You might have to tweak the audio level out of the DTMF pad to make sure the audio isn't too hot.
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Ewwwwwwwww...
Been there, done that. Gets tedious real fast, especially when you screw something up.
