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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 configure CUCM redundancy on an H323 gateway?
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.
#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
Ccm-manager music-on-hold
Single Number Reach (Mobile Connect)

2. What terminology translates to SRST?
SERVICE PARAMETER > Device Name of GK0controlled Trunk That Will Use Port 1720 > US_Trunk (or whatever you're using)||> Host Name/IP of GK That Will Use RAS UDP Port 1719 > (IP of GK) ||BE SURE TO RESTART THE TRUNK in CUCM and possibly the CUCM Servi
Reroute when there is a WAN Outage.
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM

3. How do you ensure an H323 GW always uses the Sub as primary and Pub as a backup?
SERVICE PARAMETER > Device Name of GK0controlled Trunk That Will Use Port 1720 > US_Trunk (or whatever you're using)||> Host Name/IP of GK That Will Use RAS UDP Port 1719 > (IP of GK) ||BE SURE TO RESTART THE TRUNK in CUCM and possibly the CUCM Servi
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
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.
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.

4. How do you test a Voice Translation Rule?
#test voice translation rule 1 <input to test>
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
Auto Call Pickup Enabled

5. When setting up SIP URI where do you configure the CUCM's domain name?'
SERVICE PARAMETER> Automated Alternate Routing Enable > True
#after-hours block pattern
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)

6. Maximum Wait Time for Desk Pickup?
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
Re-enter the mgcp bind control and mgcp bind media commands.
Bandwidth

7. An MGCP gateway serving as an SRST router requires what?
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer 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
24kb/s

8. In Gatekeeper CAC how do you restrict a specific endpoint?
Automatically configures the MGCP GW for you.
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
Dial-peers
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.

9. What are the steps to configure Single Number Reach and Mobile Voice Access?
The name configuration field in ephone-dn and voice register dn

voice translation-profile|and|voice translation-rule
Sh ip rsvp reservation||sh sccp connections

10. What dtmf-relay type do you use for an H323 GW?
At the CLI: utils ntp status
Matches any length dialed number and truncates it to 4 digits.
Dtmf-relay h245-alpha
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

11. When are digits stripped in a gateway?
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
Mobile Connect
When they are explicitly matched in a destination-pattern in a dial-peer.
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage

12. What is the Service Parameter to allow the phone that is picking ip to auto answer?
Auto Call Pickup Enabled

1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit

13. With the gw-priority command - does higher or lower priority take precedence?
Higher
When multiple sites use the same route pattern - do your digit manipulation on a route list.
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
#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

14. Does CUCM support RSVP natively?
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
IP Voice Media Streaming App
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
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

15. What would force you to use telephony-service to configure SRST?
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
#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
#test voice translation rule 1 <input to test>

16. What are the commands to create vlans on an ESW?
Apply voice-class codec
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit
Reroute when here is WAN congestion.

17. How do you set the inter-digit timeout for SIP phones in CME?
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
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

(config)#voice register dialplan

18. On an H323 GW - how do you adjust the timers for redundancy hunting?
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
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
Debug ephone moh

19. How do you see the details of calls coming in and out of the PRI?
Debug isdn q931
Via the voice hunt-group parallel command
Allows you to transfer by only pressing the Transfer button once.
Max-dn|max-ephone|ip source-address

20. How do you enable AAR?
Allows you to transfer by only pressing the Transfer button once.
SERVICE PARAMETER> Automated Alternate Routing Enable > True
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group

21. How do you configure AAR?
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
(config)#voice register dialplan
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.

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

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23. On an MGCP GW - if you select Top Down under Channel Selection Order - What does that mean?
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
Top Down means that channel 1 will be the first channel used to place outgoing calls.
Automatically configures the MGCP GW for you.

24. What commands are needed to configure the voice register pool in CME?
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
#test voice translation rule 1 <input to test>
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'
Re-enter the mgcp bind control and mgcp bind media commands.

25. 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?
SIP Dial Rules
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
Call forwarding between voip to voip (when CUBE is in play)
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.

26. What must you do for a BACD script to work on a CME router?
Matches any length dialed number and truncates it to 4 digits.
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
#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

27. 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).
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
SERVICE PARAMETER> Automated Alternate Routing Enable > True
In CUCM - configure CFUR to point to it's E164 number.

28. How do you configure SRST?
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
Sends the Calling Name.
Call-manager-fallback or telephony-service mode SRST
It's best to strip digits at the voice port.

29. What is SIP URI?
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.
Phone number followed by domain name.|i.e. 3006@ipxcme.com

30. How do you allow the Calling Name to be sent to the PSTN on a router?
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
Higher
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie
(config)#voice register dialplan

31. What does rule 1 /^.*(....$)/ /1/ do?
Matches any length dialed number and truncates it to 4 digits.
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
(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
...

32. What types of digit manipulation can you perform at the route pattern?

Bottom up - to prevent glare.
Configure it on the route group through the route list - then it will be local to the route list.
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!

33. How is NTP sych setup in CUCM?
The Called/Calling Transformations are superceded.
Single Number Reach (Mobile Connect)
CUCM OS Administration Settings --> NTP Servers
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False

34. What do you need to do to activate the CME GUI?
Dial-peers
On CUCM it's identical to adding an H323 GW.
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
Single Number Reach (Mobile Connect)

35. What are the commands to configure SRST in fallback?
Phone number followed by domain name.|i.e. 3006@ipxcme.com
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
Master/Slave relationship. CUCM controls it.
(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

36. How do you enable Extension Mobility for a device in CME?
CUCM Service Parameters --> Call Park Reversion Timer
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
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 ....
Assign a logout-profile to the ephone.

37. What is a best practice for digit manipulation - in regards to H323 GWs?
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
To notify SIP Phones of NTP
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
Re-enter the mgcp bind control and mgcp bind media commands.

38. What should you configure before entering auto qos?
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Bandwidth
sh ephone reg|and|debug voip dialpeer
At the CLI: utils ntp status

39. 'If you're not getting a DHCP address from CUCM what then?
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.
1 ... this is not optional!
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

40. What are the basic ephone-dn and ephone commands?
Dial-peers
#after-hours block pattern
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
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

41. Where can you find the command to restore any of the default IP Phone Services if they happen to have been deleted?
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
In the CUCM 7.0.1 Release Notes ... search for restore.
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
(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

42. How do you ensure no inter-digit timeout fro SIP phones within CUCM?
Sh ip rsvp reservation||sh sccp connections
SIP Dial Rules
Sh ccm-manager
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.

43. How do you configure CUBE?

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44. What is Phone NTP Reference used for?
To notify SIP Phones of NTP
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
On CUCM it's identical to adding an H323 GW.
Phone number followed by domain name.|i.e. 3006@ipxcme.com

45. When a CUCM device dials a number - what happens?
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 .)
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files

46. What's the best way to do digit manipulation on an IOS gateway?
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
voice translation-profile|and|voice translation-rule
#test voice translation rule 1 <input to test>
Dial-peers

47. What are the basic SCCP Commands fro telephony-service in CUCME?
Apply it to the ephone.
(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
Proxy Line Mode has multiple icons on the phone.|Shared Line Mode has only one.
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files

48. What are two caveats to using the ccm-manager config server</ip> command?
Re-enter the mgcp bind control and mgcp bind media commands.

8kb/s
Call Simulator. You can use to validate path from router to the PSTN.

49. What is call-forward pattern used for?
Call forwarding between voip to voip (when CUBE is in play)
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable

50. How do you create a trunk on the switch side?
CUCM Service Parameters --> Automated Alternate Routing Enable --> True
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones