SIP Version I

[ZweHtet]

One of the our customer is will be use SIP Version (i) according to their company policy. 3CX is supported SIP Version i, if not supported, is there any solution we can try?

 

[YiannisH_3CX]

3CX is using SIP version 2 so not sure what will work and what will not. However I would recommend that your customer updates the company policy because I am not aware of anyone still using SIP version 1 anymore.