[cisco-voip] Best Practices

[Gary L. Pate]

I'm trying to determine a "best practices" when setting up inbound DID's,
extensions, etc. Let me explain:

 

In most situations I've been involved in, I've used the last 4 digits of a
DID as someone's extension. I make sure the LEC sends 10 digit's, and I do a
significant digits of 4 on the gateway. This has always worked well, and is
easy to configure. However, in a recent install, this customer was using 3
digit extensions, so I again had the LEC send 10 digits, and I made the
gateway significant digits of 3. Again, this worked, but the problem was
that I started running into to many situations where I had duplicate 3
digits. For example, a DID might be 593-3183, so the phone extension was
183. But I also had a existing fax line number that was 444-4183. As you can
see, the last 3 digits are the same. I could not make a translation pattern
of 444183 because the gateway was only sending 3 digits. I ended up having
the LEC forward the 4444183 to one of the DID ranges, and then gave the fax
the number from that range, but that is not what I want to do in the future.


I guess what I want to know is what is the "best practice" going forward? Is
it a good idea to have the LEC send 10 digits, and if so, what should I set
on the gateway for significant digit's, and how should I handle my internal
phones that are using the last four digits of the DID as their extension?
I've read a document on using translation patterns to prefix digits, etc,
but I'm not sure if that is the directions I should go. 

Can someone offer advice on this, and perhaps provide an example of how to
do this with both a 4 digit example, and a 3 digit example? I really want to
have more control over the lines, and not have to worry much about duplicate
numbers or having the LEC getting involved.

 

Gary

 

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://puck.nether.net/pipermail/cisco-voip/attachments/20060917/cd86ef57/attachment.html