Unique Number
Customers applying for 4006 services in Beijing are assigned a unique national 4006 number by Beijing Netcom. Customers with multiple telephone numbers who apply for the 4006 service need only publish one unique 4006 number. Calls to the 4006 number can be connected to different numbers according to the customer's business requirements.
Call forwarding on busy/no answer
When an incoming call to a 4006 number is busy or unanswered, the call can be forwarded to one or several pre-set numbers. Service customers can register up to four forwarding numbers, i.e., two forwarding numbers each for busy and no-answer forwarding. For one call from a business customer, the maximum number of forwards is limited to twice.