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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 create a trunk on the router side?
TRUE
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
'Service Parameters --> Auto Answer Timer

2. How do you enable Extension Mobility for a device in CME?
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
Assign a logout-profile to the ephone.
#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

3. What are the commands to configure a SIP phone in CUCME?
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
Precede the # with a > ... so 9011*>#
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
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3

4. What command is needed on a gateway for it to invoke the DSP to convert multicast MOH stream to TDM?
Ccm-manager music-on-hold
Matches any length dialed number and truncates it to 4 digits.
Service Parameter --> Block OffNet To OffNet Transfer --> True
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.

5. Is the order of the MRGs in an MRGL significant?
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
Debug ephone moh
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
Reroute when there is a WAN Outage.

6. What are the basic ephone-dn and ephone commands?
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
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
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

7. When you make a call and it results in a secondary dial-tone - What is this a symptom of?
Service Parameters --> Mobile Voice Access Number
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
In the CUCM 7.0.1 Release Notes ... search for restore.
(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

8. What are the base telephony-service commands for CME?
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.
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
In CUCM - configure CFUR to point to it's E164 number.

9. On the RDP What is the Rerouting CSS used for?
1 ... this is not optional!
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
Single Number Reach (Mobile Connect)
(config)#service dhcp|(config)#no ip dhcp conflict logging|(config)#ip dhcp excluded-address <low IP> <hi IP>|(config)#ip dhcp-pool <name>|(dhcpconfig)#network <network name> </nn or mask>|(dhcpconfig)#domain-name <domain>|(dhcpconfig)#dns-server <IP

10. Privacy is enabled system-wide in CUCM by default. (T or F)
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
(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
TRUE
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group

11. On an MGCP GW - if you select Top Down under Channel Selection Order - What does that mean?
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
In the CUCM 7.0.1 Release Notes ... search for restore.
Top Down means that channel 1 will be the first channel used to place outgoing calls.
...

12. What are the commands to configure a T1/E1 PRI?
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
(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
When configuring TEHO.
Mobile Voice Access

13. What is CSIM?
Service Parameter --> Block OffNet To OffNet Transfer --> True
Call Simulator. You can use to validate path from router to the PSTN.
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs

14. When it comes to H323 gateways - what should you always change - unless explicitly told not to?
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
SERVICE PARAMETER> Automated Alternate Routing Enable > True
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
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.

15. What are the commands to configure SRST in fallback?
Single Number Reach (Mobile Connect)
CUCM Service Parameters --> Automated Alternate Routing Enable --> True
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
Call forwarding between voip to voip (when CUBE is in play)

16. How do you allow the Calling Name to be sent to the PSTN on a router?
Sends the Calling Name.
The Called/Calling Transformations are superceded.
To enable two-stage dialing.
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie

17. 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.
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
Call forwarding between voip to voip (when CUBE is in play)

18. What are the commands to configure a MGCP Gateway? (router)
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
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.
Apply voice-class codec
Automatically configures the MGCP GW for you.

19. Which takes precedence Device Locations or Device Pool Locations?
Device Pool Locations
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
Sh ccm-manager

20. What commands are needed to configure the voice register pool in CME?
Auto Call Pickup Enabled
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
'Service Parameters --> Auto Answer Timer
(config)#voice register dialplan

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

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22. What would force you to use telephony-service to configure SRST?
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
#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

23. Describe the relationship between route patterns and end devices.
Debug ephone moh
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.
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.

24. 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
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
(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
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs

25. What are the steps to configure Single Number Reach and Mobile Voice Access?
24kb/s
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

+ [CC 1-3 digits] [National Number max 15 minus CC digits]

26. When do you use translate called? Translate calling?
It's best to strip digits at the voice port.
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)
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
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.

27. How do you configure CUBE?

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28. 'If you're not getting a DHCP address from CUCM what then?
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
When configuring TEHO.
It's best to strip digits at the voice port.
Call Simulator. You can use to validate path from router to the PSTN.

29. How do you configure an MGCP GW? (router side)
1 ... this is not optional!
(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
Apply voice-class codec
(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

30. What's the difference between AAR and SRST?
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
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
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

31. How much bandwidth does a G.729 call including layer 3 require?
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
24kb/s
Precede the # with a > ... so 9011*>#
When they are explicitly matched in a destination-pattern in a dial-peer.

32. If you can't use a tech-prefix or default tech-prefix how do you get around the fact that CUCM does not register it's endpoint to GK?
#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
Outbound dial-peers
Use the alias static configuration||alias static (IP of CUCM) gkid (GK ID) gateway voip ras (IP of CUCM) e164 (dn) e164 (dn) e164 (dn)

33. What should you configure before entering auto qos?
Precede the # with a > ... so 9011*>#
Bandwidth
Call Simulator. You can use to validate path from router to the PSTN.
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.

34. How do you prevent toll fraud on CUCM?
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
When configuring TEHO.
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
Apply voice-class codec

35. How do you configure a SIP Trunk? (router side)
voice translation-profile|and|voice translation-rule
(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
Max-dn|max-ephone|ip source-address
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast

36. What is a best practice for digit manipulation - in regards to H323 GWs?
(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
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
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 .)
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

37. Does CUCM support RSVP natively?
Service Parameters --> Mobile Voice Access Number
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
Service Parameter --> Block OffNet To OffNet Transfer --> True
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.

38. When setting up SIP URI where do you configure the CUCM's domain name?'
...
Reroute when here is WAN congestion.
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name
...

39. What's the best way to perform digit manipulation on a route group?
At the CLI: utils ntp status
Configure it on the route group through the route list - then it will be local to the route list.
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
TRUE

40. When configuring a Gatekeep-controlled trunk - what do you do with the Wait for Far End H.245 TCS option?
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
(config)#sh cdp neigh detail
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
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.

41. How do you configure phone ports on an ESW?
8kb/s
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.

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

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43. If the PSTN is presenting on channel 1 - should you configure CUCM to search 'top down' or 'bottom up'?
Bottom up - to prevent glare.
TRUE
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.

44. On the RDP What is the CSS used for?
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
Allows you to transfer by only pressing the Transfer button once.
Mobile Voice Access
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.

45. How is NTP sych setup in CUCM?
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
CUCM OS Administration Settings --> NTP Servers
Dtmf-relay h245-alpha
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify

46. What dtmf-relay type do you use for an H323 GW?
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
Use the alias static configuration||alias static (IP of CUCM) gkid (GK ID) gateway voip ras (IP of CUCM) e164 (dn) e164 (dn) e164 (dn)
sh ephone reg|and|debug voip dialpeer
Dtmf-relay h245-alpha

47. How do you support multiple codecs on a dialpeer?
Apply voice-class codec
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.
Call Simulator. You can use to validate path from router to the PSTN.
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

48. When using drop-through-option What is the max number of huntgroups?
1 ... this is not optional!
'Use before the ... so XXXX
Higher
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP

49. Where can you find the command to restore any of the default IP Phone Services if they happen to have been deleted?
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
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
In the CUCM 7.0.1 Release Notes ... search for restore.
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup

50. What are the commands to ensure an H323 GW always uses the Sub as primary and Pub as a backup?
Re-enter the mgcp bind control and mgcp bind media commands.
#voice service voip| #no supplementary-service h225-notify cid-update
#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
#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

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CCIE Voice Test

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