The SHANG332 is because of having the FXO, so it can be used to connect VOIP with the PSTN .The SHANG332 can provide the varieties, such as 8 FXOs,16 FXOs,24 FXOs and 32 FXO...etc. It can be used for the termination service so that the voip calls connects into the PSTN
2. configuration example
When the Calling Card carries completed the Calling Card server, they can make use of the FXO gateway at small scaled, with low cost, vivid, for general use etc. broadly develop the access number, but don't need the specialized circuit and PSTN Operators’s support. For example deploy each city with a FXO gateway, each business agent can have the independence FXO gateway and access numbers.
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