SBC sends INVITEs with delay
Hi Experts, recently we have deployed an Acme 3820.
We have a scenario with the PBX in the core side and IP-phones in the access side behind NAT.
PBX --- ACME --- NAT --- IP phones
Phones are configured in an hunt group with call broacast logic (all phones ring simultaneously).
Phones are configured to monitor other extensions using SUBCRIBE/NOTIFY messages.
So, when a call is forwarded from the PBX towards ACME, the multiple INVITEs are preceded by NOTIFY messages.
In the core leg, the INVITES arrived simultaneously. In the access leg, the SBC sends the INVITEs with delay. See image below: