While most customers do not need to upgrade their network in order for the phones to function correctly, we do recommend that some basic network guidelines and firewall rules are put in place. These general guidelines are appropriate for a business of any size any should generally be followed whether or not you have a VoIP system. Some of those recommendations include:
1) Using Your Own Router (Not your ISP’s router): Some small business rely on the router of their Internet Service Provider (ISP) instead of purchasing their own. These businesses may not realize that by doing so they may be leaving their network open to unnecessary security risks and have less control over the protection and functions of their network. Often, customers who switch from an ISP router to their own purchased router report improved quality of service both for their phone system and their internal network. We recommend installing a router of your own, although it is not mandatory. If your current router has limitations which do not allow proper use of the phones there is also equipment that we can provide to help overcome local network issues and this can be shipped to you for a minimal one-time charge.
2) Disabling SIP ALG: SIP ALG is a setting in many routers that blocks VoIP traffic from working correctly. Disabling this setting is a simple button within the router that can drastically improve the performance of your phone system. Virtually all VoIP systems require this function to be disabled. Your IT support can do this for you, or if you do not have an IT person, our remote technicians may be able to assist if you have the login username and password to your router available.
3) Do Not Block Outbound Ports: Although most networks do no block outbound ports, it is important to note that if your network requires that outbound ports be specifically blocked or port isolation is being implemented, notify us so that we can work with your IT team to ensure that the appropriate ports are opened to allow voice traffic