Searching for Router Sip Support information? Find all needed info by using official links provided below.
https://support.onsip.com/hc/en-us/categories/200237184-Router-Configuration-
Thorough Articles and Expert Support for OnSIP's Hosted VoIP solutions
https://support.8x8.com/equipment-devices/network-devices/disable-sip-alg-router-firewall
Disabling SIP-ALG is an essential part of configuring the firewall on your router and optimizing it for 8x8 service, which is why routers sold by 8x8 come preconfigured with ALG disabled. Many ALGs (including Cisco's) have bugs which cause call flow and registration failures.
https://support.onsip.com/hc/en-us/articles/203706874-D-Link-DIR-615-Wireless-N-Router
Router Configuration Step 1: Disable SIP Application Layer Gateway. D-Link routers ship with an Application Layer Gateway that interferes with SIP traffic and prevents us from being able to properly detect NAT settings, thereby causing difficulties with transfers. In order for OnSIP to work properly, the SIP Application Layer Gateway must be disabled.
https://www.voicehost.co.uk/help/sip-alg-and-why-it-should-be-disabled-your-router
SIP ALG stands for Application Layer Gateway and is common in all many commercial routers. Its purpose is to prevent some of the problems caused by router firewalls by inspecting VoIP traffic (packets) and if necessary modifying it.
http://support.esi-estech.com/index.php?/Knowledgebase/Article/View/261/80/blacklist-routers-with-known-sip-issues
A SIP ALG router rewrites the REGISTER request so the proxy doesn't detect the NAT and doesn't maintain the keep-alive (so incoming calls will be not possible). Breaking SIP signaling: Many of the actual common routers with inbuilt SIP ALG modify SIP headers and the SDP body incorrectly, breaking SIP and making communication just impossible.
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