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CCIE Voice Test

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. How do you maintain 4-digit dialing to phones that are running in an SRST scenario (WAN outage)?

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2. How do you use the # as a string terminator within a SIP Dial Rule?
On CUCM it's identical to adding an H323 GW.
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
(config)#isdn switch-type primary-net5 (or whatever's provided)|(config)#network-clock-participate wic 0||(config)#controller e1 0/0/0|(config-controller)#pri-group timeslot 1-3|(config-controller)#no shut||(config)#int s0/0/0:15 (this is created aft
Precede the # with a > ... so 9011*>#

3. How do you configure an MGCP GW? (router side)
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
Service Parameters --> Mobile Voice Access Number
Assign a logout-profile to the ephone.
(config)#ip domain-name <NAME>|(config)#isdn switch-type primary-ni|(config)#network-clock-participate wic 0||(config)#controller t1 0/0/0|(config-controller)#pri-group timeslots 1-3 - 24 service mgcp|(config-controller)#no shut||(config)#interface s

4. When setting up SIP URI where do you configure the CUCM's domain name?'
Higher
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
To enable two-stage dialing.
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name

5. A show isdn status shows TEI_ASSIGNED. What do you do to get MULTIPLE_FRAME_ESTABLISHED?
Re-enter the mgcp bind control and mgcp bind media commands.
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit
#after-hours block pattern

6. Calls coming from CUCM to PSTN need what?
Outbound dial-peers
To notify SIP Phones of NTP

To enable two-stage dialing.

7. 'How do you inform a SIP phone of NTP information?
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group

8. How do you enable AAR?
Phone number followed by domain name.|i.e. 3006@ipxcme.com
Gatekeeper - zone local GK cisco.com 10.1.6.1 - zone local CUCM cisco.com invia GK outvia GK - zone local BR2 cisco.com invia GK outvia GK
Assign SIP Dial Rules
SERVICE PARAMETER> Automated Alternate Routing Enable > True

9. With the gw-priority command - does higher or lower priority take precedence?
Outbound dial-peers
Higher
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage

10. What would force you to use telephony-service to configure SRST?
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!

11. When dealing with an MGCP GW there is no intelligence on the router. How would you strip an incoming Called Number from 10 to 4 digits?
Proxy Line Mode has multiple icons on the phone.|Shared Line Mode has only one.
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.

12. What should you configure before entering auto qos?
Bandwidth
When configuring TEHO.
Call forwarding between voip to voip (when CUBE is in play)
Debug isdn q931

13. How do you block calls under call-manager-fallback?
Ccm-manager music-on-hold
#after-hours block pattern
Apply it to the ephone.
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary

14. In CME Where is the Calling Name derived from?
The name configuration field in ephone-dn and voice register dn
At the CLI: utils ntp status

voice register pool|and|voice register dn

15. What are the commands to configure an H323 GW?
Assign a logout-profile to the ephone.
Put them in a route list.
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
#int lo0|#h323-gateway voip bind srcaddr [IP]||#isdn switch-type primary-ni|#network-clock-particpate wic0||#controller t1 0/0/0|#pri-group timeslots 1-3||#int serial 0/0/0:23|#isdn outgoing display-ie|#isdn b-chan selection order [use opposite of wh

16. What is the bit rate for a G.729 call excluding layer 2?
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie
8kb/s
SIP Route Pattern over a SIP Trunk.

17. What are the steps to configure Single Number Reach and Mobile Voice Access?

Higher
#test voice translation rule 1 <input to test>
(config)#sh cdp neigh detail

18. What dtmf-relay type do you use for an H323 GW?
Precede the # with a > ... so 9011*>#
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
Dtmf-relay h245-alpha

19. When can you not use a Standard Local Route Group?
(config)#voice register dialplan
When configuring TEHO.
Matches any length dialed number and truncates it to 4 digits.
Ip domain-name ipexpert.com|network-clock-participate wic 0|isdn switch-type primary-ni||controller t1 0/0/0|pri-group timeslots 1-3 - 24 service mgcp|no shut||int serial 0/0/0:23|isdn bind-l3 ccm-manager|ccm-manager mgcp|ccm-manager redundant-host 1

20. What are the commands to create vlans on an ESW?
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit

Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
Debug ephone moh

21. Which takes precedence Device Locations or Device Pool Locations?
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.
Service Parameter --> Block OffNet To OffNet Transfer --> True
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable
Device Pool Locations

22. What is a best practice for digit manipulation - in regards to H323 GWs?
8kb/s
Voice register global|mode cme|source-address <IP>|max-dn <NUM>|max-pool <NUM>|tftp-path flash:/<PATH>|create profile||NOTE: You have to do a create profile every time you change the voice register pool
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
Single Number Reach (Mobile Connect)

23. What are the basic ephone-dn and ephone commands?
Ephone-dn 1 <dual / octo>|number 3001|description 3214-3001 !!! PHONE BANNER !!!||ephone 1|mac-address 001b.d4c6.ca99|button 1:1|type 7961|max-calls-per-button 5|busy-trigger-per-button 3
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
Voice register dn 1| number 4002||voice register pool 1|id mac 0022.0022.0022|type 7961ge|number 1 dn 1|dtmf-relay rtp-nte|no vad
The Called/Calling Transformations are superceded.

24. How do you test a Voice Translation Rule?
Outbound dial-peers
24kb/s
#test voice translation rule 1 <input to test>
(config)#isdn switch-type primary-ni|(config)#network-clock-participate wic 0||(config)#controller t1 0/0/0|(config-controller)#pri-group timeslots 1-3|(config-controller)#no shut||(config)#voice service voip|(conf-voi-serv)#sip|(conf-serv-sip)#bind

25. How do you get around relying on DNS for your CUCMs?
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs

26. How do you create a trunk on the switch side?
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
Sh ccm-manager
Trunk Port Method (3750 or ESW)||interface fa0/1|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10|switchport voice vlan 20|spanning-tree portfast
CUCM OS Administration Settings --> NTP Servers

27. Is the + character supported on a VOIP dial-peer?

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28. What are the 3 mandatory commands within call-manager-fallback?
Call Simulator. You can use to validate path from router to the PSTN.
SERVICE PARAMETER> Automated Alternate Routing Enable > True
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
Max-dn|max-ephone|ip source-address

29. How is NTP sych setup in CUCM?
Automatically configures the MGCP GW for you.
...
1 ... this is not optional!
CUCM OS Administration Settings --> NTP Servers

30. On a gatekeeper trunk - how do you ensure the Sub is used as primary and Pub as backup?
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
Call forwarding between voip to voip (when CUBE is in play)
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
On CUCM it's identical to adding an H323 GW.

31. How do you disable KPML?
Assign SIP Dial Rules
Create a Route Pattern for the local site and the remote site:||RP-LOC --> PT-REM --> RL-TEHO-LOC||RP-REM --> PT-LOC --> RL-TEHO-REM
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)

32. In a SIP Dial Rule how do you represent a dialed * instead of it being used as a wildcard?

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33. How do you configure class of service (CoS) in CUCM? CME?
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.
At the CLI: utils ntp status
Call-manager-fallback or telephony-service mode SRST

34. What are the commands to configure a MGCP Gateway? (router)
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
Ip domain-name ipexpert.com|network-clock-participate wic 0|isdn switch-type primary-ni||controller t1 0/0/0|pri-group timeslots 1-3 - 24 service mgcp|no shut||int serial 0/0/0:23|isdn bind-l3 ccm-manager|ccm-manager mgcp|ccm-manager redundant-host 1
Show ccm-manager

35. How do you allow H323 calls to be preserved should the primary H323 GW fail?
#voice class h323 1| #h225 timeout tcp establish 3||#dial-peer voice 3000 voip| #destination-pattern 3...| #voice-class h323 1| #session target ipv4:(SUB IP)| #dtmf-relay h245-alpha||#dial-peer voice 30001 voip| #destination-pattern 3...| #voice-clas
In CUCM - configure CFUR to point to it's E164 number.
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False

36. When it comes to H323 gateways - what should you always change - unless explicitly told not to?
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
CUCM Service Parameters --> Call Park Reversion Timer
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False

37. 'If you want to make changes to any softkeys where do you do it?
Debug ephone moh
#test voice translation rule 1 <input to test>
Reroute when there is a WAN Outage.
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.

38. What terminology translates to SRST?

Reroute when there is a WAN Outage.
Auto Call Pickup Enabled
When multiple sites use the same route pattern - do your digit manipulation on a route list.

39. How would you set the the timer for Auto Answer?

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40. If you have an H323 Gateway at a siet where the phones are controlled by CUCM - what do you need from a dial-peer perspective?
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
Interface f0/0|no ip address|no shut||interface f0/0.10|encap dot1q 10 native --> !!! DATA VLAN !!!|ip address 10.10.100.1 255.255.255.0|interface f0/0.20|encap dot1q 20 --> !!! VOICE VLAN !!!|ip address 10.10.200.1 255.255.255.0
You need pots dial-peers for incoming calls and you need a voip dial-peer pointing to the CUCM so the H323 GW and connect the call to those phones.

41. How do you prevent toll fraud on CUCM?
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
The Called/Calling Transformations are superceded.
Matches any length dialed number and truncates it to 4 digits.
...

42. What does Display-IE do?
Sends the Calling Name.
Phone number followed by domain name.|i.e. 3006@ipxcme.com
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
To enable two-stage dialing.

43. In CUCME what SIP config command is equivalent to ephone and ephone-dn?
voice register pool|and|voice register dn
In CUCM - configure CFUR to point to it's E164 number.
#isdn switch-type primary-ni|#network-clock-participate wic 0|#controller t1 0/0/0|#pri-group timeslots 1-3 service mgcp||#ccm-manager mgcp ccm-manager redundant-host [IP]|#ccm-manager fallback-mgcp (for srst)|#ccm-manager moh||#mgcp|#mgcp call-agent
Dtmf-relay h245-alpha

44. What are the commands to create the L3 routing interface for VLANS (SVI)?
Int vlan 130|ip address 10.10.101.1 255.255.255.0|int vlan 240|ip address 10.10.201.1 255.255.255.0
sh ephone reg|and|debug voip dialpeer
(config)#isdn switch-type primary-ni|(config)#network-clock-participate wic 0||(config)#controller t1 0/0/0|(config-controller)#pri-group timeslots 1-3|(config-controller)#no shut||(config)#voice service voip|(conf-voi-serv)#sip|(conf-serv-sip)#bind
voice translation-profile|and|voice translation-rule

45. What is Phone NTP Reference used for?
To notify SIP Phones of NTP
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
(config)#isdn switch-type primary-ni|(config)#network-clock-participate wic 0||(config)#controller t1 0/0/0|(config-controller)#pri-group timeslots 1-3|(config-controller)#no shut||(config)#voice service voip|(conf-voi-serv)#sip|(conf-serv-sip)#bind

46. What does ccm-manager config server [IP]</ip> do?
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
Automatically configures the MGCP GW for you.
24kb/s
Call-manager-fallback or telephony-service mode SRST

47. How do you verify that NTP is working on the CUCM server?
Matches any length dialed number and truncates it to 4 digits.
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
At the CLI: utils ntp status
sh ephone reg|and|debug voip dialpeer

48. How do you block an external call from being transferred back out to the pstn by an internal user?
Service Parameter --> Block OffNet To OffNet Transfer --> True
#after-hours block pattern

Sh ip rsvp reservation||sh sccp connections

49. How do you enable Extension Mobility for a device in CME?
(config)#isdn switch-type primary-ni|(config)#network-clock-participate wic 0||(config)#controller t1 0/0/0|(config-controller)#pri-group timeslots 1-3|(config-controller)#no shut||(config)#voice service voip|(conf-voi-serv)#sip|(conf-serv-sip)#bind
It's best to strip digits at the voice port.
Assign a logout-profile to the ephone.
Voice register dn 1| number 4002||voice register pool 1|id mac 0022.0022.0022|type 7961ge|number 1 dn 1|dtmf-relay rtp-nte|no vad

50. What are the commands to configure SIP phones in CME?
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
Voice register dn 1|number 3001|voice register pool 1|number 1 dn 1|id mac 001b.ac02.14de|type 7961|dtmf-relay rtp-nte|description 3214-3005 !!! PHONE BANNER !!!|codec g711u
Voice register global|mode cme|source-address <IP>|max-dn <NUM>|max-pool <NUM>|tftp-path flash:/<PATH>|create profile||NOTE: You have to do a create profile every time you change the voice register pool
Ip domain-name ipexpert.com|network-clock-participate wic 0|isdn switch-type primary-ni||controller t1 0/0/0|pri-group timeslots 1-3 - 24 service mgcp|no shut||int serial 0/0/0:23|isdn bind-l3 ccm-manager|ccm-manager mgcp|ccm-manager redundant-host 1