I am having an issue when I transfer a call directly to another extension, after the call is transferred there is a busy tone. The call is successfully transferred, but the phone that did the transfer is getting a busy tone.
Can anyone help with that
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Hello, there are few factors need to consider:
- Dst. Extension is local:
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If the ext is local then it might not be using Firewall to route the traffic
In case there are multiple vlans, then we need to make sure all required SIP traffic is allowed from Vlan1 SRC to Vlan 2 DST
- Dst. Extension is Remote:
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If the DST is remote then we need to make sure both site devices have SIP ports allowed
Further you might need to make sure routing is correct, if its using VPN then desired subnets should be allowed on Phase2
You can also perform sniffing and debugs on the firewall to review traffic flow
https://community.fortinet.com/t5/FortiGate/Technical-Tip-Packet-capture-sniffer/ta-p/198313
I'm getting the same thing with our phone system. Did you find any way to alter that audio? The transferred call goes through as expected, but on the transferring side of things it does seem a bit odd to hear the busy signal.
No, Don't find a way to alter the audio, This part of a reply I am not sure about ( we need to make sure all required SIP traffic is allowed from Vlan1 SRC to Vlan 2 DST)
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