Most current generation networking devices will have a SIP ALG setting, if you are having problems with call quality, enabling/disabling this setting can help.
IP Addresses to be White Listed for all equipment/networks. Due to NAT, all ports should be opened/whitelisted as phones will randomize the port used.
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Manufacturer Links:
- Cisco Firewalls
- Juniper SRX Series Firewalls
- Mikrotik
- Meraki
- Ubiquiti
- ZyXel
Migrated from Confluence on 2026-02-03
Original Confluence Article
