On 02/17/2010 05:45 AM, Asim Riaz wrote:
what I understand that PDB server have all the routing information for all the numbers and SIP-Router receive that information and route the call accordingly but how PDB server receive the routing data? Do we need to load this routing data manually?
This is implementation-specific; the fact that the module has been advertised as usable for number portability does not imply that this is the exclusive use, or that there are any insightful portability-specific features included.
The canonical PDB server is just a simple UDP listener that returns a 16-bit integer value in network byte order, as explained in pdb_query(). A PDB server implementation is located in the source tarball in utils/pdbt, and contains some implementations for resolving carrier IDs based on DNIS
What happen if the routing information for a number is changed, do we need to update manually?
On the Kamailio/SR side, it is queried dynamically every time pdb_query() is called. On the PDB server side, it would appear that an update must happen manually with respect to the map file or other data source, yes.
Basically, you can build the server however you want as long as you follow the (very simple) protocol specification. You don't have to use the built-in PDB server.