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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. In Gatekeeper CAC how do you restrict a specific endpoint?
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
Configure it on the route group through the route list - then it will be local to the route list.
Call Simulator. You can use to validate path from router to the PSTN.
(config)#voice register dialplan

2. What CM Service needs to be start in Serviceability for MOH to work?
IP Voice Media Streaming App
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files

3. When a device is roaming to a different site How does it get the Roaming Sensitive Settings from the Device Pool?
SIP Route Pattern over a SIP Trunk.
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.

4. How do you prevent toll fraud on CUCM?
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie
To notify SIP Phones of NTP
#interface vlan 130 (voice vlan)| #h323-gateway voip interface| #h323-gateway voip id BR2 ipaddr 10.1.6.1| #h323-gateway voip h323-id UK| #h323-gateway voip bind srcaddr 10.1.130.1
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True

5. When are digits stripped in a gateway?
To enable two-stage dialing.
Mobile Connect
When they are explicitly matched in a destination-pattern in a dial-peer.
Dial-peers

6. What do you need to do to activate the CME GUI?
24kb/s
Find the GUI Files - show flash | i .html|ip http server|ip http path flash:/<PATH TO FILES>||telephony service|web admin system name admin pass cisco|dn-webedit
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
Precede the # with a > ... so 9011*>#

7. How do you configure phone ports on an ESW?
(config)#isdn switch-type primary-net5|(config)#network-clock-participate wic 0||(config)#Controller e1 0/0/0|(config-controller)#pri-group timeslot 1-3 !!!Get the PRI up!!!|(config-controller)#no shut||(config)#int s0/0/0:15|(config-if)#isdn outgoin
Single Number Reach (Mobile Connect)
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
Redundant dial plan. One on CUCM and one on the routers via dial-peers.

8. How do you configure AAR?
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
The Called/Calling Transformations are superceded.
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

9. Name 4 useful show commands for active calls.
#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
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
On CUCM -- UPTSAL||Create Your Users|Phone - set owner id|Create SIP Trunk|SIP Trunk Security Profile||Application Server|Licensing||||On CUPS||Work Left to right

10. How much bandwidth does a G.729 call including layer 3 require?
Sh ip rsvp reservation||sh sccp connections
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
24kb/s
CUCM Service Parameters --> Automated Alternate Routing Enable --> True

11. Where can you find the command to restore any of the default IP Phone Services if they happen to have been deleted?
Find the GUI Files - show flash | i .html|ip http server|ip http path flash:/<PATH TO FILES>||telephony service|web admin system name admin pass cisco|dn-webedit
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
In the CUCM 7.0.1 Release Notes ... search for restore.

12. How do you ensure an H323 GW always uses the Sub as primary and Pub as a backup?
Create 2 voip dial-peers - one the Sub and one to the Pub (the Pub with a preference of 1). Then create a voice class h323and set the h225 timeout value so it will hunt between the two.
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
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
In CUCM - configure CFUR to point to it's E164 number.

13. How do you convert a full PRI 9config'd by ccm-manager config server) back to a Fractional PRI?

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
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)

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

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15. SNR is also known as?
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
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
IP Voice Media Streaming App
Mobile Connect

16. What is a best practice for digit manipulation - in regards to H323 GWs?
Reroute when there is a WAN Outage.
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
#after-hours block pattern
Master/Slave relationship. CUCM controls it.

17. What does the Transfer On-hook Enabled Service Parameter do?
Allows you to transfer by only pressing the Transfer button once.
CUCM OS Administration Settings --> NTP Servers
The Called/Calling Transformations are superceded.
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!

18. What types of digit manipulation can you perform at the route pattern?
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
Configure it on the route group through the route list - then it will be local to the route list.
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
(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

19. How do you allow H323 calls to be preserved should the primary H323 GW fail?
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False

+ [CC 1-3 digits] [National Number max 15 minus CC digits]
voice translation-profile|and|voice translation-rule

20. By Nov. 16 - 2010||I am happy confident and thankful that I am now a CCIE Voice Certified engineer! My technical knowledge of the Cisco UC portfolio is truly unsurpassed. I have opened up a wealth of opportunities for myself and my family and
It matches a route pattern| Which points to a route list| Which point to a route group| Which contains a GW or Trunk|*Then it needs to match on an incoming VOIP diap-peer (incoming called -number .)
...
SIP Dial Rules
Single Number Reach (Mobile Connect)

21. If you're using Called/Calling Party Transformations at the Route Pattern - what happens if you do Digit manipulation at the route list?
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
Bottom up - to prevent glare.
The Called/Calling Transformations are superceded.
Find the GUI Files - show flash | i .html|ip http server|ip http path flash:/<PATH TO FILES>||telephony service|web admin system name admin pass cisco|dn-webedit

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

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23. How do you prevent H323 caller-id updates to CUCM
#voice service voip| #no supplementary-service h225-notify cid-update
#voice class h323 1| #h225 timeout tcp establish 3||#dial-peer voice 3000 voip| #destination-pattern 3...| # voice-class h323 1| #session target ipv4:10.1.5.3 (sub)| #dtmf-relay h245-alpha||#dial-peer voice 30001 voip| #destination-pattern 3...| #pre
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
Assign a logout-profile to the ephone.

24. What are the 3 mandatory commands within call-manager-fallback?
CUCM OS Administration Settings --> NTP Servers
Max-dn|max-ephone|ip source-address
Transfer to external is blocked by default.|To ensure only transfer to internal is allowed - make sure only the following tx pattern is under telephony-service||#telephony service| #transfer-pattern ....
To enable two-stage dialing.

25. When it comes to H323 gateways - what should you always change - unless explicitly told not to?
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
(config)#isdn switch-type primary-net5|(config)#network-clock-participate wic 0||(config)#Controller e1 0/0/0|(config-controller)#pri-group timeslot 1-3 !!!Get the PRI up!!!|(config-controller)#no shut||(config)#int s0/0/0:15|(config-if)#isdn outgoin
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Debug ephone moh

26. How do you prevent toll fraud on CME?
Transfer to external is blocked by default.|To ensure only transfer to internal is allowed - make sure only the following tx pattern is under telephony-service||#telephony service| #transfer-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
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.

27. On a gatekeeper trunk - how do you ensure the Sub is used as primary and Pub as backup?
Mobile Connect
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
Debug isdn q931
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.

28. Name 2 commands to verify RSVP functionality.
When they are explicitly matched in a destination-pattern in a dial-peer.
Sh ip rsvp reservation||sh sccp connections
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
8kb/s

29. With the gw-priority command - does higher or lower priority take precedence?
#voice service voip| #no supplementary-service h225-notify cid-update
Higher
Re-enter the mgcp bind control and mgcp bind media commands.
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify

30. On an H323 GW - how do you adjust the timers for redundancy hunting?
#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

Mobile Voice Access
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3

31. How do you see the details of calls coming in and out of the PRI?
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
Transfer to external is blocked by default.|To ensure only transfer to internal is allowed - make sure only the following tx pattern is under telephony-service||#telephony service| #transfer-pattern ....
Debug isdn q931
Proxy Line Mode has multiple icons on the phone.|Shared Line Mode has only one.

32. What is the bit rate for a G.729 call excluding layer 2?
8kb/s
(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
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
TRUE

33. How do you create a trunk on the switch side?
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit
...
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!

34. A show isdn status shows TEI_ASSIGNED. What do you do to get MULTIPLE_FRAME_ESTABLISHED?
#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
Re-enter the mgcp bind control and mgcp bind media commands.
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.

35. What are the commands to create the L3 routing interface for VLANS (SVI)?
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
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
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs

36. When using drop-through-option What is the max number of huntgroups?
Dtmf-relay h245-alpha
1 ... this is not optional!
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
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False

37. What are the commands to configure a SIP phone in CUCME?
Route Patterns --> Route Lists --> Route Groups --> Gateways/Trunks|RPs point to Route Lists which contain one or more Route Groups which contain one or more Gateways/Trunks.
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
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
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

38. How do you enable Extension Mobility for a device in CME?
Top Down means that channel 1 will be the first channel used to place outgoing calls.
Service Parameters --> Mobile Voice Access Number
Debug ephone moh
Assign a logout-profile to the ephone.

39. What's the difference between AAR and SRST?
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
The + character is not supported on a VOIP dial-peer.||So you'll need to add back on the POTS dial-peer before it gets to the PSTN via a voice translation-rule.
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage

40. Where is it best to manipulate digits for inbound calls?

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41. How do you use the # as a string terminator within a SIP Dial Rule?
Configure it on the route group through the route list - then it will be local to the route list.
Precede the # with a > ... so 9011*>#
Master/Slave relationship. CUCM controls it.
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.

42. What are the commands to manually configure an MGCP gateway?
#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
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
Outbound dial-peers

43. How do you enable AAR system wide?
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 pool|and|voice register dn
CUCM Service Parameters --> Automated Alternate Routing Enable --> True
Route Patterns --> Route Lists --> Route Groups --> Gateways/Trunks|RPs point to Route Lists which contain one or more Route Groups which contain one or more Gateways/Trunks.

44. How do you configure phone ports on a 3750?
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast

Matches any length dialed number and truncates it to 4 digits.

45. How do you see multicast packets being sent?
(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
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
Debug ephone moh

46. In CUCME what SIP config command is equivalent to ephone and ephone-dn?
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
voice register pool|and|voice register dn
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary

47. On an MGCP GW - if you select Top Down under Channel Selection Order - What does that mean?
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
#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
8kb/s
Top Down means that channel 1 will be the first channel used to place outgoing calls.

48. What is the full E164 format?
...
SIP Route Pattern over a SIP Trunk.
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
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

49. How do you test a Voice Translation Rule?
#test voice translation rule 1 <input to test>
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
Sh ccm-manager
No POTS dial-peer or no direct-inward-dial on a pots dial-peer

50. If you're using Called/Calling Party Transformations at the Route Pattern and tranformations at the route list ... What does the RP affect and What does the RL affect?
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
Service Parameter --> Block OffNet To OffNet Transfer --> True
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.

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CCIE Voice Test

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