VoIP One Way Audio: Causes and a Step-by-Step Fix Checklist
Why one side of a VoIP call cannot hear: NAT, SIP ALG, blocked RTP ports, codecs. A checklist for the router, the…
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Tag: SIP phone
VoIP QoS and Voice VLAN: Network Setup for Clear IP Phone Calls
Set up VoIP QoS and a voice VLAN for IP phones: DSCP EF 46, LLDP-MED, bandwidth per codec, latency and jitter targets,…
What is SIP? SIP Protocol Explained for Business Phone Systems
What SIP is, how a SIP call works (REGISTER, INVITE, RTP), SIP vs VoIP, ports 5060 and 5061, SIP trunks vs extensions,…
WebRTC Calling: Browser Softphones on Your Business PBX
What WebRTC calling is, how it differs from a SIP phone, how browser phones connect to an IP PBX over WSS with…
How to Choose an IP Phone for Your Office: A Buyer Checklist
What matters when you choose IP phones: SIP lines, HD voice, PoE, dual Ethernet, headset support, security, auto provisioning and support.
SIP Phone Configuration: Register an IP Phone to a PBX
How to register a SIP phone to an IP PBX by hand: the settings you need, step by step set-up, recommended values…