Windows 10 "sip call tester" downloads

SIPp
... use the Session Initiation Protocol (SIP). It generates call traffic and can act as either a user ... useful to administrators, developers and telecom engineers evaluating SIP proxies, PBXs, media servers, gateways and related equipment. ...
Price: FREE / Open Source
sipcli
SipCLI is a command-line utility for testing SIP services and automating VoIP calls. It is intended for network administrators, VoIP engineers and developers who need to exercise SIP servers or repeat communication tasks from scripts and ...
Price: FREE / Freeware