[Serusers] pdt module

[Richard]

Due to the lack of resources, this is my temporary
solution. I am using cisco PSTN gateway. When
configuring dial-peer for one domain, I use the dns
name as session target instead of ip address. The
message Cisco sends to ser will be 5551212 at test.com
instead of 5551212@<ser-ip-address>. To convert the
PSTN number to internal extension, I use alias. I
don't know about the scalability of alias table. With
many users, it can grow very large. It would be nice
if we can have regular express to manipulate the uri.
So each company only has one entry in the alias table.

Thanks,
Richard


--- Elena Ramona Modroiu <ramona at iptel.org> wrote:
> Hi,
> 
> right now you cannot bypass the terminator digit of
> the code. This 
> solution was chosen having in mind automatic
> generation and no length 
> limitation of prefixes. 
> 
> The module was intended to serve the calls from
> terminal adapters to 
> other domains. There are a lot of different
> situations in real world and 
> the module could be extended in the future to
> address the most common 
> ones. Contributors are always welcome! :-)
> 
> Ramona
> 
> Richard wrote:
> 
> >Hi,
> >
> >I had a chance to try the pdt module. It works very
> >well. In pdt module in source code, there is a very
> >good README. Also under pdt/doc, there are several
> sql
> >and php scripts.
> >
> >First create a database "pdt" and a table
> "domains".
> >Grant ser access to the database if you want. The
> >table domains has two columns "code" and "domain".
> For
> >example, a domain abc.com has e164 number range
> >2345xyz. It uses xyz for internal extension and sip
> >uri xyz at abc.com. You can manually add a record with
> >2345 as code and abc.com as domain. When a call
> comes
> >in via pstn gateway to 2345678 at 1.2.3.4. The
> function
> >prefix2domain translates it into 678 at abc.com.
> >
> >What I don't understand is the terminator digit.
> It's
> >a digit used by all domains to end a code. For
> >example, if it is 5 and code is 234, prefix2domain
> >translate 2345678 to 678 by removing code and then
> >terminator. In North American, there is no
> terminator.
> >Is there a way to bypass it?
> >
> >Another issue is that the function removes the code
> >from original number. The assumption is that the
> >domain owns the whole block. It is not always the
> >case. For example, company A may have
> 2345200-2345399
> >and company B have 2345400-2345599. So code 2345 is
> >possible to be mapped into two companies. We can't
> use
> >two records mapping 23452 and 23453 to company A
> >because it creates overlapped number. In another
> >example, a company has two number blocks,
> >2345200-2345299 and 6789200-6789299. Two records
> can
> >be defined in the database, map 23452 and 67892 to
> the
> >same domain. Same problem, the rest of numbers are
> in
> >an overlapped range. 
> >
> >The problem can be solved if we can define how many
> >digits are removed instead of removing all code
> >digits. In the first example, we can define code
> 23454
> >and 23455 map to A.com, but only remove the initial
> >four digits. So they rest of number are unique
> within
> >company A. In the second example, we only remove
> the
> >initial three digits, so 52xxx and 92xxx are still
> >unique within the company. If this new number don't
> >match the internal extension, we can always use
> alias
> >to change it.
> >
> >This solution requires some change to the source
> code.
> >
> >Thanks,
> >Richard
> >
> >
> >
> >	
> >		
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> >  
> >
> 



	
		
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