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CDM CDM1550 for Allstar using a Universal Radio Controller

K

kc2fwn

Newbie
Joined
Jan 5, 2022
Messages
2
Location
Rochester NY
Hello,
I have a Universal Radio Controller (URC - Universal Radio Controller v2.2 Technical Reference – G1LRO HOMEPAGE) and I have it configured for Allstar using a HampVoip, ASL3 on Pi4 and Pi5.
I have used 2 radios successfully, a Quancheng and I built a cable for a Leixen 898. Both work perfectly with my node configuration.
I've been trying to get a Motorola CDM1550 programmed to use the OHIS configuration, the same configuration I used for the Leixen.

The piout that I've found does not really work. The PTT, or Audio setting are not understood by the URC.
I tried this Pinout
TX/RX:
pin2-Tx audio
pin3-PTT
pin7-ground
pin11-Rx audio

I have not used pin8-COR out

The URC cannot activate the PTT, or it believes that the PTT is always on.
I would like to see who has configured this radio, or a CDM 1250 (almost identically) to work with Allstar and what interface you used.

Thank you for any help that you guys can give me.
Hector - KC2DWN
 
F

ff026

Member
Feed Provider
Joined
Dec 19, 2002
Messages
746
Location
ff026
Did you set the PTT pin for active low? Reading the documentation for the link you posted it states the PTT relay goes low for activation.
 
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