YateNPDB

   If you want to use  Number Portability in current network deployment, you need:
1. install yate-npdb
   uprmi.update -a;urpmi yate-npdb  (for Mageia OS)
   yum makecache fast;yum install yate-npdb (for CentOS OS)
  dnf makecache; dnf install yate-npdb (for other Linux OSes)

2. Add equipment of type: npdb from YateMMI web management interface
   Log into MMI, go to Equipment -> Add custom equipment (bottom left corner) -> add required* fields (type = npdb)

3. Add a test phone number / serie
   Number portability database has 2 types or matching: per number and per series of numbers
   Log into MMI, go to Equipment -> Number Portability -> Here 4 tables are found
   a) Statistics
   b) Check
   c) Set ported, which adds a phone number in YateNPDB (Number Portability database)
   d) Set series, which adds a serie of numbers in Yate NPDB (Number Portability database)

4. This procedure (steps: 1, 2 and 3) are made per node/server who need yate-npdb.
   For example if server1 has YateSTP and server2 has YateSMSC, we need to install 2x yate-npdb software: one on server1 and one on server2
   We can define the name of the equipment like this: server1-npdb and server2-npdb

YateMMI acts as a centralized entity of various YateNPDB entities (see point 4) in the way that if a request (add/edit/delete number or series from NPDB) is sent directly to YateMMI, MMI will broadcast the request to each active yate-npdb entity configured.
Number Portability database are offering a way for systems administrators of MNO or MVNOs to implement/manage MNP (Mobile Number Portability)
MNP (Mobile Number Portability) is the functionality, which enables subscribers to change their service provider (MNO/MVNO) whilst keeping their already assigned/existing MSISDN phone number.
Depending on globe zone or country, MNP (Mobile Number Portability) is implemented in varying ways (recipient-led or donor-led).
More about MNP can be found on Wikipedia. ( https://en.wikipedia.org/wiki/Mobile_number_portability )