The function allows the user by entering a 5-digit number to receive a call from any concrete company’s telephone. There are no definite groups for picking up the call. One can pick up the call from any telephone set; it is only necessary to enter the required code and the extension number of the phone, which has to be picked up.
Teles Communication Systems
TELES Communication Systems is a leading provider of equipment, solutions and services to fixed, fixed-mobile convergence and Next-Generation-Network (NGN) service providers. With more than 160 carrier network customers and millions of voice ports deploye
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