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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. Two useful troubleshooting commands for CUCME?
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
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.
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
sh ephone reg|and|debug voip dialpeer

2. When a device is roaming to a different site How does it get the Roaming Sensitive Settings from the Device Pool?
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
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

3. 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 .)
CUCM Service Parameters --> Call Park Reversion Timer
Reroute when here is WAN congestion.
Auto Call Pickup Enabled

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

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5. 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?
Mobile Voice Access
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
Automatically configures the MGCP GW for you.
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).

6. How do you ensure that G.711 only is used?
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable
Outbound dial-peers
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
24kb/s

7. On the RDP What is the CSS used for?
Sends the Calling Name.
Single Number Reach (Mobile Connect)
Mobile Voice Access
To enable two-stage dialing.

8. When it comes to H323 gateways - what should you always change - unless explicitly told not to?
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Apply it to the ephone.

9. How do you configure a gateway to register with gatekeeper?
#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
IP Voice Media Streaming App
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
#voice service voip| #no supplementary-service h225-notify cid-update

10. SNR is also known as?
Auto Call Pickup Enabled
The Called/Calling Transformations are superceded.
Mobile Connect
On CUCM it's identical to adding an H323 GW.

11. Where can you find the command to restore any of the default IP Phone Services if they happen to have been deleted?
Top Down means that channel 1 will be the first channel used to place outgoing calls.
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 .)
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
In the CUCM 7.0.1 Release Notes ... search for restore.

12. How do you allow the Calling Name to be sent to the PSTN on a router?
...
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
8kb/s
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie

13. Privacy is enabled system-wide in CUCM by default. (T or F)
When configuring TEHO.
Put them in a route list.
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
TRUE

14. 'If you want to make changes to any softkeys where do you do it?
'Use before the ... so XXXX
Sh ccm-manager
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.
'Service Parameters --> Auto Answer Timer

15. How do you configure AAR?
(config)#sh cdp neigh detail
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
voice register pool|and|voice register dn
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.

16. How do you use the # as a string terminator within a SIP Dial Rule?
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
It's best to strip digits at the voice port.
Ccm-manager music-on-hold
Precede the # with a > ... so 9011*>#

17. Aside from the Media Resources --> Mobile Voice Access where else do you need to specify the the Mobile Voice Access DN?
#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
Service Parameters --> Mobile Voice Access Number
#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
Put them in a route list.

18. 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.
Higher
(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
Debug isdn q931

19. How do you allow H323 calls to be preserved should the primary H323 GW fail?
Debug isdn q931
In CUCM - configure CFUR to point to it's E164 number.
...
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False

20. How would you enable security on a GK?
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
Automatically configures the MGCP GW for you.
The name configuration field in ephone-dn and voice register dn

21. What are the commands to configure a T1/E1 PRI?
Mobile Voice Access
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
Via the voice hunt-group parallel command
(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

22. How do you configure DHCP in IOS?
1 ... this is not optional!
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit
(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
Top Down means that channel 1 will be the first channel used to place outgoing calls.

23. What is the full E164 format?
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.

24. What does the Transfer On-hook Enabled Service Parameter do?
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
Allows you to transfer by only pressing the Transfer button once.
IP Voice Media Streaming App
#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

25. When do you use translate called? Translate calling?
Call-manager-fallback or telephony-service mode SRST
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
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 ....

26. On an MGCP GW - how could you see the primary and backup CUCM servers?
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
Show ccm-manager

27. A show isdn status shows TEI_ASSIGNED. What do you do to get MULTIPLE_FRAME_ESTABLISHED?
Call forwarding between voip to voip (when CUBE is in play)
SERVICE PARAMETER> Automated Alternate Routing Enable > True
#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.

28. How do you configure phone ports on an ESW?
Master/Slave relationship. CUCM controls it.
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

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 ....

29. When do you do digit manipulation at the route pattern as opposed to the route list?
When multiple sites use the same route pattern - do your digit manipulation on a route list.
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
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 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

30. An MGCP gateway serving as an SRST router requires what?
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
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
Single Number Reach (Mobile Connect)
1 ... this is not optional!

31. What are the commands to configure NTP in IOS?
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
Assign SIP Dial Rules
Matches any length dialed number and truncates it to 4 digits.

32. How do you ensure no inter-digit timeout fro SIP phones within CUCM?
sh ephone reg|and|debug voip dialpeer
SIP Dial Rules
(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
When configuring TEHO.

33. What is a best practice for digit manipulation - in regards to H323 GWs?
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
(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
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
'Use before the ... so XXXX

34. If you're using Called/Calling Party Transformations at the Route Pattern - what happens if you do Digit manipulation at the route list?
Bandwidth
The Called/Calling Transformations are superceded.
Sends the Calling Name.
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

35. When can you not use a Standard Local Route Group?
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
When configuring TEHO.

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

36. How do you set up redundancy on outbound dial-peers on an H323 gateway?
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
SIP Dial Rules
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 ....
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)

37. Describe the relationship between route patterns and end devices.
Phone number followed by domain name.|i.e. 3006@ipxcme.com
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
In the CUCM 7.0.1 Release Notes ... search for restore.
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.

38. How do you test a Voice Translation Rule?
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
Service Parameter --> Block OffNet To OffNet Transfer --> True
#test voice translation rule 1 <input to test>
Redundant dial plan. One on CUCM and one on the routers via dial-peers.

39. What are the commands to configure SIP phones in CME?
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
(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
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
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

40. What are the base telephony-service commands for CME?
#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
On CUCM it's identical to adding an H323 GW.
'Service Parameters --> Auto Answer Timer
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files

41. What is the Service Parameter to allow the phone that is picking ip to auto answer?
Service Parameters --> Mobile Voice Access Number
Auto Call Pickup Enabled
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
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

42. When are digits stripped in a gateway?
When they are explicitly matched in a destination-pattern in a dial-peer.
Put them in a route list.
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
Mobile Voice Access

43. How do you configure an MGCP GW? (router side)
Single Number Reach (Mobile Connect)
(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
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
In CUCM - configure CFUR to point to it's E164 number.

44. What are the basic SCCP Commands fro telephony-service in CUCME?
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
Service Parameters --> Mobile Voice Access Number
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
#voice service voip| #no supplementary-service h225-notify cid-update

45. How do you verify where MOH is being served up from?

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

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47. How do you use an ephone template?
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
Apply it to the ephone.
CUCM Service Parameters --> Call Park Reversion Timer
The name configuration field in ephone-dn and voice register dn

48. Is the order of the MRGs in an MRGL significant?
Dial-peers
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.

49. Name 2 commands to verify RSVP functionality.
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
Sh ip rsvp reservation||sh sccp connections

Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'

50. How do you get around relying on DNS for your CUCMs?
(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-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
Mobile Voice Access