The SHANG332 is because of having the FXO, so it can be used to connect VOIP with the PSTN .The SHANG33232 can provide the varieties, such as 8 FXOs,16 FXOs,24 FXOs and 32 FXO…etc. It can be used for the access method of the calling card service so that the calling card server connects into the PSTN.
- configuration example
the IP telephone company, when they are lack of the digital E1/T1 connection, can use analogue line to provide termination to PSTN. For example the outside line has 8 lines, number is 82901131.