[cisco-voip] Re: How to Block Caller-ID on 2600/5300 with T1/E1

[Lelio Fulgenzi]

North America has Vertical Service Codes which are listed here. These are two digit codes prefixed by a * for touch tone or 11 for pulse. In this case, it would be *67, Calling Number Delivery Blocking. 

In this case, you could create a translation pattern or route pattern, that would capture 9*67.@ and send it out to the PSTN with 'Calling Party Presentation' set to restricted with a Pre-Dot drop. I haven't tested this yet, but I don't see why it wouldn't work. The only thing you wouldn't get is the familiar 'triple tone' that signifies to the calling party that your request has been activated.

To block all calls, you can simply choose to set the "Calling Party Presentation" to restricted on either your route patterns, route list or gateways. With the last always taking precedent over the first. You will always have to supply a valid DN for outgoing calls though, the PSTN wants to see that, and it is always transmitted, it's just the presentation bit that gets set to restricted. This is of course, for tracking who called who. The end caller will never see the number though.

  ----- Original Message ----- 
  From: READY, David 
  To: 'cisco-voip at puck.nether.net' 
  Sent: Tuesday, August 17, 2004 8:12 PM
  Subject: [cisco-voip] Re: How to Block Caller-ID on 2600/5300 with T1/E1


  On Tue, Aug 17, 2004 at 12:10:36PM +0200, Arnd Vehling wrote:
  > Hi,
  > 
  > does anyone know how to block the caller-id transmission
  > per default for all outgoing calls over an T1 Interface
  > on a cisco 2600/5300?
  > 
  > When "googling" cisco.com i only see a "caller-id" command
  > for analog ports but no hint on how to block outgoing
  > caller-id on T1/E1 ports.

  Hi,

  Another way of doing it is....... In Australia we can dial a 1831 (turn CLI
  off on that call only) and 1832 (send CLI on this call only) prefix before
  the outgoing number to block/unblock CLI. I know our fine-feathered fellow
  members of the 'coalition of willing' [USA] don't like to follow most
  international standards [wink] but if your carrier/s have something similir
  you could prefix 1831 to all outgoing calls and your carrier's switch will
  make all calls private.

  David
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