double answer for ISDN?

[ychuan]

Is there any similar command at the ISDN configuration? to block collect calls? i know in E1 R2 cisco have the double-answer

[teodorgeorgiev]

I do not think that there is such a command in the ISDN. And I have never met a similar one in any other ISDN voice gateway. You should know that R2 is a kindly different protocol from ISDN. ISDN does not have so called "Telco function parameters" like "type of call" (operator, coin phone and etc)...