Since VOIP traffic flows through your router, its important to make sure your router is configured to allow traffic to and from NUSO's switch. Please reference the document below.
METASWITCH VOICE / LAN CHANGES
Allow inbound / outbound traffic to the following IPs:
SBC IPs:
4.28.93.167
8.40.32.227
64.20.190.27
38.91.65.157
IP Blocks:
4.28.93.128/25
4.79.132.208/28
4.53.160.128/28
4.53.160.64/27
38.104.160.16/28
38.91.65.128/25
8.40.32.0/24
64.20.190.0/26
206.166.213.0/24
Recommended Firewall Settings:
Disable SIP ALG / SIP Transformations
Enable Consistent NAT
Increase or disable UDP timeout. 10 minutes or greater. (600 seconds)
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