We have Asterisk installed on Ubuntu at first ISP network behind ISP’s gateway nat with forwarded ports.
We have our office with router on Debian at Second ISP behind NAT.
Almost all users use 3CX Phone for making outgoing calls.
The problem is that I can have 2 managers sitting near by with no voice problems and 2 more managers near them who have voice loosing.
On asterisk i see this:
It’s at night time, when almost no one is in office, latency reaches 130ms, some why…
The traceroutes from both sides:
When I ping from host behind office router asterisk’s gateway with 1400 packet size i see latency not more then 18-19ms.
I’ve started snmp monitoring with cacti of Ubuntu server where Asterisk is, but traffic, cpu and memory is OK.
I’ve used cisco ip sla with jitter-udp on other network, it really could help, but I really don’t know how to measure udp jitter between at least Debian gateway and Ubuntu ASterisk server.
I can just assume that I need to lanuch some application from office to asterisk, which could measure packet delay and packet jutter, or laucnh some kind of RTP and SIP sniffer on asterisk which will show this information…
Can you please help me with advice?