[Asterisk-Users] Collect calls

[jltaylor]

Since you are referring to R2 signaling, it works like this:

The E1 R2 Call Blocking feature provides two ways to block incoming collect
calls-category-based and double answer. With category-based call blocking,
collect calls will be blocked based on a specific category. For example, in
Brazil, collect calls arrive with a category II-8, for which the gateway
should send B-7 as a response instead of an answer signal. This approach is
only applicable when switches in the central office support category-based
blocking.

For legacy switches that do not support category-based blocking, the double
answer method is implemented to support the collect-call blocking. For an
incoming collect call, the gateway will answer the call with a clearback
after one second and re-answer the call after two seconds, causing the
collect call to be dropped and normal calls to stay connected.

This is what the referenced patches are attempting to do.

This does not work in the U.S. or if you have SS7, you don't need it.

James

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com]On Behalf Of Michael D
Schelin
Sent: Tuesday, May 03, 2005 6:06 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] Collect calls


You Bring up a great point. I understand these codes and my system
brings them in via ss7 but as youself I don't know how to protect my
network from these charges. I will follow this post to see if anybody
has a fix.


Rodrigo P. Telles wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Hi Folks,
>
> Does someone knows how to identify and block collect calls on Asterisk
> using PRI
> channels?
> I googled it and found this:
> http://lists.digium.com/pipermail/asterisk-dev/2004-November/007500.html
> I don't know what does it mean!!!
> Can someone help me to understand this?
>
> I tried to apply that way too, using Flash() but Flash() complains and
> looks
> like just work with FXO channels:
> http://lists.digium.com/pipermail/asterisk-users/2004-October/066360.html
>
> Thanks in advance.
>
> - --
> ============================================
> Rodrigo P. Telles <telles at devel.it>
> IVOZ # 1009
> TI Manager
> Devel-IT - http://www.devel.it
> Bestcom Group
> ============================================
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> 5foewh0m/o3ABMqcNHhtQs4=
> =rsu2
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