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Silver

Sending Caller ID to PSTN

Hello,

My customer based in the USA (Knoxville, TN) came up with the following request:

They want to send out calls with caller id not belonging to the range of their DIDs. (For instance they want to send Caller ID belonging to New York, California and other states). They contacted BellSouth and were told that ANY caller ID passed through their PRI will be presented as is. They bought few dozens of SIMs from all around the US and want to send out those numbers out when the calls are made from ip phones (in order to look like a bigger company with local presence in different states).

I have two concerns about it

1. I would expect telco to discard any caller id not belonging to the DID range that was payed for.

2. I do have concerns regarding the legal aspect of the above configuration.

Any input would be much appreciated.

Thanks,

Marina

2 REPLIES

Re: Sending Caller ID to PSTN

Please see below the places in callmanager administration where you can configure caller ID:

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1) "Directory Number Configuration" page.

Scroll down to "External Phone Number Mask". Enter here the number that you want to send to the PSTN. Then click on "update" at the top of the page. You have to repeat this same procedure for the other extensions configured for this IP Phone (if you want to send those numbers also to the PSTN).

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2) "Route Pattern Configuration" page.

Locate the route pattern that you are using for doing calls to the PSTN.

Scroll down to the "Calling Party Transformations" section.

- If you check the "Use Calling Party's External Phone Number Mask" checkbox, you will use the number that you configured in the "Directory Number Configuration" page as caller ID.

- If you uncheck that checkbox, then you can configure the "Calling Party Transform Mask". Just enter here a number like, as an example, 978858xxxx (callmanager will fill out the xxxx with phone's 4-digit extension).

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3) "Route List Detail Configuration" page.

Go to the "Calling Party Transformations" section.

"Use Calling Party's External Phone Number Mask" > if you set it to "on", you will use the number that you configured in the "Directory Number Configuration" page as caller ID. If you set it to "off", then you need to configure the "Calling Party Transform Mask" (next line on this same page). The setting that you use here will override the settings that you configured in the "Route Pattern Configuration" page.

You configure the "Calling Party Transform Mask" here in the same way as explained for the "Route Pattern Configuration" page.

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4) "Gateway Configuration" page.

Go to the Gateway and select the PRI that you are using for outgoing calls. Under 'Outbound Calls' you should see the Caller ID DN field. In here you can configure also the Caller ID.

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In other words Caller ID works as follows:

- Gateway configuration overrides everything else.

- Route List configuration overrides the Route Pattern and the Directory Number Configuration.

- Route Pattern overrides only the Directory Number configuration.

So answering your questions:

1.- The telco should pass the caller ID that you are sending as it is only caller ID not the actual number that you payed.

2.- Not sure about this, but I have never heard of a legal problem because of sending a caller ID from a different state but again not 100% sure.

Hall of Fame Super Gold

Re: Sending Caller ID to PSTN

Honestly, I'm astonished to lean that a person or organization with access to a PRI, can place calls with an arbitrary calling number.

If it is like that, it seems that PRI access is the demark among being able to to the above, or not, like eeverybody else.

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