7, 10 and 11 digit dialling
Оne of the most popular number dialling types in the USA and Canada is 10 digit dialling, which represents itself a code of addressee’s location and directly the very number of the addressee.
Sometimes there is number 1 at the beginning of the set; this method is called 11 digit dialling. In this case number 1 is the code of the addressee’s country. 7 digit dialling is used in case if the addressee is situated by the same location code as the caller
By using Portech SBK-32 expander for 32 SIM-cards, you can increase the number of channels in the Portech MV-37X GSM VoIP gateway series using the Internet.
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