LNPA Working Group 2nd Report on Wireless Wireline Integration:
 
 911 Issue Statement, caused during Mixed Wileline Wireless Service 
While porting between Wireline and Wireless SPs. and Proposed Solutions

 
 911 Issue Statement:

During the mixed service period, as defined in the Wireline Wireless Integration Second Report (section 3.6), an unacceptable public safety situation may occur for the time period when both donor and recipient phones can make 911 calls. In the event of a disconnected 911 call before NPAC activation, the PSAP can only call back a donor wireline phone and cannot call back a recipient mobile phone that is able to originate calls. After NPAC activation, the PSAP can only call back a recipient mobile phone and cannot call back a donor wireline phone that is able to originate calls.
 
Proposed Solutions:

In order avoid unacceptable public safety liability, the following and other alternatives needs to be evaluated further. 

•	Enhance 911 Systems to identify the origin of a 911 call so that the correct phone can always be called back in the event of a disconnect. It is recommended that the technical alternatives be defined and then referred to NENA for evaluation.

•	Ask the customer to sign a waiver/agreement indicating they understand the limitations of 911 until the port is complete. Disconnect the line from old SP immediately after NPAC activation.

•	Obtain immunity from liability from the appropriate regulatory authority.