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Old 08-16-2017, 04:40 AM
tomfarrell tomfarrell is offline
Join Date: Mar 2013
Posts: 7
tomfarrell has 10 reputation points
Default PAI, From or Diversion Header ?

We are having problems completing calls to 8YY toll free numbers when routing thru a vector to ATT’s SIP service IP Flex

1. Public caller dials 483-4400

2. 483-4400 is a vdn that routes caller to vector 115 (see attached pdf of the vector)

3. If caller selects option 1 or option 2 caller is routed to a toll free number.
a. 855-474-xxxx
b. 866-835-xxxx

4. The caller ID sent is the public callers phone number, not one of our cm7 numbers.

5. ATT rejects the call because ATT cannot properly bill the owner of the toll free number.
a. All ATT will see is caller ID of the person making the call
b. ATT apparently checks that caller ID against all the numbers in our IP Flex trunks and rejects the call because it cannot find a match in the database.
c. ATT suggested a couple of options and Avaya chose the diversion header method.

ATT suggested fixes:

You just need to change the From, PAI or Diversion header to match a number in your call plan and the 8yy calls will complete.

Patrick C.

Avaya then comes up with the following script for use in our SBCE’s.
We named it Diversion Manipulation

See attachment Script 1 Diversion Manipulation

This script fixed the problem with the toll free numbers sent thru the vector.
BUT, I noticed that the script was applied globally, so that now every outbound invite from the SBC has that diversion header attached.

A couple other problems became apparent in the next few weeks.
Some systems (pbx’s) don’t like the diversion header.

1. A local call from one of our desk phones to the State Police Helpdesk will not complete normally.
a. Cell calls to the SP complete normally.
b. Removing the diversion header and calls complete normally from a desk phone.

2. A call to another toll free number 877-963-xxxx routes to the diversion header number 483-4400.
a. Removing the diversion header and calls complete normally from a desk phone.

Avaya created a New Diversion:

See attachment Script 2 New Diversion

Now we have:

1. 855-474-xxxx thru vector works ok
2. 866-835-xxxx thru vector works ok
3. Local call to SP works ok
4. Toll free call to 877-963-xxxx routes to the diversion header number (483-4400 local) which is wrong

So now I am thinking that the solution may not be SBCE related.
I feel like the guy plugging leaks in the dam, and I am running out of fingers.


• Is there a better way to route callers off network from vector processing ?
o If the vector can be manipulated to send the toll free numbers with a cm7 caller ID that would solve all the problems

• You just need to change the From, PAI or Diversion header to match a number in your call plan and the 8yy calls will complete
o This note from ATT suggests that there is more than 1 way to skin a cat.

• Is there a way to put a header into the signaling manipulation in a case by case basis ?
o The Global signaling may solve some problems but create new ones also.

Any suggestions are appreciated.

Tom in Michigan
Attached Files
File Type: docx Script 2 called New Diversion.docx (12.3 KB, 124 views)
File Type: pdf vector 115.pdf (12.0 KB, 45 views)
File Type: docx Script 1 called Diversion Manipulation.docx (12.1 KB, 147 views)

Last edited by tomfarrell; 08-16-2017 at 05:33 AM. Reason: clarified statements
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