No tones with originate

Asterisk Asterisk Support
1

when I dial an outside number, I hear ringtones
when I use manager originate, there is silence until the called party picks up.
I am using

action: originate
channel: local/31
exten: ${callee}
context: default
priority: 1

and exten 31 is just

exten => 31, 1, Dial(SIP/headphone,60,tr)

Which knobs do I have to turn?

Musicman

2

addendum:

there are tones when originating for an iax hardphone, but they are missing when I use a sip hardphone

Musicman