Double Answer

[ychuan]

Hi,

Is there any command similar for ISDN that have the same function for R2 Digital (Double Answer)??? I'm trying to block few end user to use the collect call service.

regards

[ebreniz]

Are looking for something like Incoming Call Preauthentication.

http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/products_configuration_guide_chapter09186a00800ca6ee.html#1001276

[ychuan]

Hi,

Can the Incoming Call Preauthentication block collect calls users?? Have you ever tried? (do you recommend any configuration). I need something that can make polarity inversion on the PRI/ISDN E1 trunk, because my country collect call rules are a little bit different

Regards,