[asterisk-users] Asterisk Transfers

Joshua C. Colp jcolp at digium.com
Thu Mar 28 13:17:47 CDT 2019

On Thu, Mar 28, 2019, at 2:56 PM, Dan Cropp wrote:
> Thank you Joshua.
> We're trying to run more tests.
> We believe Cisco may not be adhering to the specification.  
> Unfortunately, we're also stuck with having to make it work.
> An interesting test, I commented out the norefersub from the 
> res_pjsip_refer.c code just for a test.  Without this, Cisco does sent 
> the NOTIFY packets to let Asterisk know the status (Trying, Ringing, 
> OK, 486 Busy Here, ...)
> Would it make sense for me to try including the Refer-Sub in the REFER 
> packet Asterisk sends to Cisco?  Perhaps Cisco sees the norefersub, but 
> not the Refer-Sub header.  It may interpret the lack of a Refer-Sub 
> header in the REFER incorrectly?

It's entirely possible it might. It doesn't hurt to try.

Joshua C. Colp
Digium - A Sangoma Company | Senior Software Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - US
Check us out at: www.digium.com & www.asterisk.org

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