Free Cisco 350-801 Actual Exam Questions - Question 7 Discussion
configuration snippet configures the ISDN E1 PRI for this task?
E imo, since UPDATE can modify session parameters including DTMF settings, and C because PRACK ensures reliability of provisional responses that might carry DTMF negotiation info. NOTIFY feels less direct here.
It’s definitely not A or B since REGISTER and SUBSCRIBE don’t deal directly with session negotiation or media. Between C, D, and E, I think D can be ruled out because NOTIFY is mostly about event notifications rather than negotiating media parameters like DTMF. So C and E feel like the best fit—they’re both involved in session updates and provisional responses which are critical when troubleshooting DTMF negotiation in SIP INVITE flows.
Maybe C and D. PRACK deals with provisional responses, which might confirm DTMF methods, and NOTIFY could carry subscription info related to DTMF events. UPDATE is good, but NOTIFY might be overlooked here.
A and E. REGISTER starts the session, UPDATE often changes media attributes.