Generic selectors
Exact matches only
Search in title
Search in content

Reply To: GSM protocols


Hi Sathya!

12KHz metering pulse or line reversal concept is used only in land line for STD PCO and coin operated PCO.

In landline exchanges between phone and telphone exchange signalling is different.

In GSM, between mobille and MSC is C7 signalling.when ANM message is received call is metured