One of the most common ways mobile operators block your gateway SIM cards is by placing 'test calls' also known as 'ghost calls' or 'trace calls' through your VOIP/GSM route. When they place calls and the CLI doesn't match, they know your SIM is in a SIMBOX and they block your SIM.
Our Anti Sim Block Module detect those damaging 'test calls' and we block them from entering your GSM routes, so the mobile operators can't see your SIM cards operating. We use advanced CDR analysis algorithms, we look at call diversity, call integrity, call durations, origination points, termination points, callout frequency, numbering plan anomalies, HLR registration status, and more. Each of these datapoints help us identify 'test calls' and we block them automatically for you.
Team Developed Whitelist/Backlist Callee/Caller based routing, call forwording & some of criteria for stopping the unwanted, robot and machine calls. As per set rules robot calls will be blocked and will be coming the reasoning in report for blocking.
Mostly we prefer our client to use pc or laptop for our VBS (VoIP Bandwidth Saver) or you also can use RPi (Raspberry Pi) for stable & good quality VoIP Calls, Technically router is a very low resource equipment & design for managing traffic between networks & forwarding data packets to their intended IP addresses, and allowing multiple devices to use the same Internet connection VoIP is very heavy load system, So our recommendation is to not use Router as your CPE.
Our VBS (VoIP Bandwidth Saver) works behind any type of firewall or NAT. That means, it has anti-block feature & its DPI (Deep Packet Inspection) protected nearly impossible to block or trace your location.
As a perfect bandwidth saver VBS save more than 80% bandwidth . However, the quality of service is never compromised.
As a smart user of our VBS (VoIP Bandwidth Saver) you must have to know that ACD & ASR its not depend on any bandwidth saver solely, many things is related which is effecting your call quality most commonly your Low Bandwidth Internet & Low GSM Signal of your device, If you ensure this 2 things are fine than you will get best result of our VBS (VoIP Bandwidth Saver) which is 3+ ACD & 20% ASR.