[VoiceOps] IAM Signals

[Paul Timmins]

You shouldn't be getting billed for inbound IAMs, so as Scott said there 
should be an exact match between outbound call attempts and IAM messages.

Billing errors on SS7 traffic is something that does not surprise me, 
even from industry players who should know better.

On 02/28/2011 05:32 PM, Scott Berkman wrote:
> There should be one and only one IAM per call, regardless of direction.  The
> IAM is the first message in the SS7 call setup process, so even a canceled
> call will have an IAM.  If you are forwarding a call back off-net, then that
> would be 2 IAM's since it's probably two call legs.
>
> I'm not familiar with the billing side of this though...
>
> 	-Scott
>
> -----Original Message-----
> From: voiceops-bounces at voiceops.org [mailto:voiceops-bounces at voiceops.org]
> On Behalf Of Eric Hiller
> Sent: Monday, February 28, 2011 4:59 PM
> To: voiceops at voiceops.org
> Subject: [VoiceOps] IAM Signals
>
> I am trying to figure out where the excess of IAM messages is coming from.
> We get billed for every signal and my bills recently have been saying:
>
> SIGNAL SWITCHING...IAM...TERMINATING SIGNALS = 345 SIGNAL
> FORMULATION...IAM...TERMINATING SIGNALS = 254,181 SIGNAL TNDM
> SWITCHING...IAM...TERMINATING SIGNALS = 254,181
>
> Is this the count of IAM messages that I am sending to the tandem then?
> IE. I would have to make 254,181 calls outbound to generate these? Or are
> these IAM messages inbound and outbound? Is the ratio 1:1 as far as IAM to
> Calls?
>
> Sorry for all the questions, I am just unsure on the IAM details.
>
> Thanks!
> -Eric
>
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