Exam 350-801 topic 1 question 298 discussion

Display IE (isdn outgoing display-ie) is used mainly to provide the calling name over PRI Trunk. It can be sent in SETUP, ALERTING, or CALLPROC messages. Also, calling name (isdn supp-service name calling) is considered as supplementary service and therefore it can be carried over Facility IE instead of Display IE. However, the same command should be applied on the terminating gateway in order to decode the Facility IE value as calling name and send the displayed text to the phone (in case of CME) or to CUCM. Else, Facility IE will be forwarded without decode (raw value) and the calling name won’t be displayed since Facility IE isn’t recognized by phone or CUCM. Reference: "Caller ID Display over ISDN PRI " https://community.cisco.com/t5/collaboration-knowledge-base/caller-id-display-over-isdn-pri/ta-p/3162883

nterface Serial0/2/0:23 no ip address encapsulation hdlc isdn switch-type primary-ni isdn incoming-voice voice isdn outgoing display-ie no cdp enable

I would say C.

From what I can see online, both C and D are correct, but in the Cisco OCG it has to configure it using "isdn outgoing display-ie", so I'm guessing that's the answer they're looking for.

To set the calling name display parameters sent out on an ISDN serial interface, use the isdn supp-service name calling command in interface configuration mode. Source: https://www.cisco.com/c/en/us/td/docs/ios/voice/command/reference/vr_book/vr_i2.html

Reading the doucmentation, both C and D are valid options. C is more limiting option, so I think the answer is D. Not all ISDN switch types support the isdn outgoing display-ie command. The following shows the direction dependency by switch type, and this command can be used to override the dependency: •ETSI (NTT, NET3,and NET5)—Only network-to-user •DMS—Both ways •TS014—Only network-to-user •TS013—Only network-to-user •1TR6—Only network-to-user https://www.cisco.com/c/en/us/td/docs/ios/voice/command/reference/vr_book/vr_i2.html

I would say C. https://community.cisco.com/t5/collaboration-knowledge-base/caller-id-display-over-isdn-pri/ta-p/3162883

D isdn supp-service name calling To set the calling name display parameters sent out on an ISDN serial interface, use the isdn supp-service name calling command in interface configuration mode. To disable calling name delivery, use the no form of this command. isdn supp-service name calling [ie | operation-value-tag | profile {Network Extension operation-value-tag {ecma | iso | local} | ROSE}] no isdn supp-service name calling

i think answer is C