[App_rpt-users] SIP CT

Ken ke2n at cs.com
Fri Dec 18 09:18:58 EST 2015


The CT is when the receiver squelch closes and the time-out timer resets. It is not specifically to do with unkeying the transmitter. You can have a really long hang time and the transmitter will practically never unkey, but you still get CT’s.  I don’t think there is a time-out timer for a SIP connection. So the timer that triggers the CT is not there.   If, however, you have your SIP users entering a DTMF function to “transmit” maybe you can modify that function so it plays a tone on unkey.  Of course, unkey is usually the pound symbol so that might be tricky…

 

Ken

 

From: Mike - W5JR [mailto:w5jr.lists at gmail.com] 
Sent: Thursday, December 17, 2015 11:53 PM
To: Mike M <kf7mbk at w7ara.net>
Cc: app_rpt-users at ohnosec.org
Subject: Re: [App_rpt-users] SIP CT

 

The stations down link have the usual CTs, but the node the SIP is connected to doesn't. I'm intuiting the workaround is to have an intervening node. I've not implemented this for my connection but sounds like a good test. 

tnx

Mike / W5JR

Alpharetta GA


On Dec 17, 2015, at 5:02 PM, Mike M <kf7mbk at w7ara.net <mailto:kf7mbk at w7ara.net> > wrote:

When you "unkey" from the SIP side, I want a CT to come out on the radio. I can see what you mean about not needing a CT out of the SIP side.  But when apt_rpt unkeys the radio, whether from a link or SIP, I would think it should generate a CT on the radio. Whether that's the logic in the code, I don't know.

 

I'll play around with it tonight, maybe take a look through the code.

 

 

 

 





Regards,
Mike Montalvo, KF7MBK
ARA Membership Chair
www.w7ara.org <http://www.w7ara.org> 

 

 

 

 

 

 

On Thu, Dec 17, 2015 at 11:22 AM, <mike at midnighteng.com <mailto:mike at midnighteng.com> > wrote:

Ken your right, no sip ct.
Feeling a bit stupid after testing mine that I have not used in years, it does not
trip CT either.
I 'think' because it does not trip the COR code. It bypasses it. Could be for good
reason?

Echolink connections are full duplex. A requirement of the host.
ELink user can key-up and rptr users can converse with him without him ever
unkeying until rptr time-out. Same with SIP.
I don't feel it's pointless to have a CT at the end of any tx on a repeater.

But since most just use it for sysop testing and monitoring, no big deal.

...mike/kb8jnm

> I don't think SIP has a CT.
> SIP connections are full duplex; it's pointless to have an "over" beep.
>
> 73
> Ken
>
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