GSM Gateways use a SIM card and connect with a cellular tower. They convert the cellular connection to SIP and provide the connection as a trunk to a VoIP PBX. ... GSM Gateways are perfect for redundancy, T1 outages, or as a connection in places where inexpensive analog or SIP connections are not available.
In GSM gateway You can easily enter your mobile number on your PC and then dial the number with GSM Gatwey or from your handset. When you call a specific number from your PC, a short audio tone is generated from your PC which is shown as a small dialer on your mobile device. The audio tone does not interrupt your phone conversation on your mobile, so you can maintain your connection and uninterrupted communication.
GSM Gateways use a SIM card and connect with a cellular tower. They convert the cellular connection to SIP and provide the connection as a trunk to a VoIP PBX. The number of SIM cards a gateway can hold determines how many calls you can make.This is a where GSM gateways can be a great help. What is a GSM gateway? Basically, it’s the ability to take a SIM card from a cell provider in your area and connect it to a device which can then connect back to the phone system and be used for incoming and outgoing calls. That means you can be smart with routing rules and make calls to mobile networks from a “mobile line” which really cuts out the costing factors that make things expensive.