[asterisk-users] "__sip_xmit....Success" every 15 seconds !

[sean darcy]

On 13.9. The cli log has these messages every 15 seconds. The end point 
to linphone on android.

............
[May 12 19:02:59] WARNING[2555]: chan_sip.c:3775 __sip_xmit: sip_xmit of 
0x7effe40088b0 (len 608) to 10.10.11.95:37855 returned -2: Success
[May 12 19:03:13] WARNING[2555]: chan_sip.c:3775 __sip_xmit: sip_xmit of 
0x7effe4037860 (len 608) to 10.10.11.95:37855 returned -2: Success
[May 12 19:03:27] WARNING[2555]: chan_sip.c:3775 __sip_xmit: sip_xmit of 
0x7effe40088b0 (len 608) to 10.10.11.95:37855 returned -2: Success
[May 12 19:03:41] WARNING[2555]: chan_sip.c:3775 __sip_xmit: sip_xmit of 
0x7effe4037860 (len 608) to 10.10.11.95:37855 returned -2: Success
............

Any clue why I get I'm continually warned about Success ?

jay