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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?
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
#after-hours block pattern
IP Voice Media Streaming App
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

2. What are the steps to integrate CUPS with CUCM?
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
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
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
sh ephone reg|and|debug voip dialpeer

3. How do you configure SRST?
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable
Sh ip rsvp reservation||sh sccp connections
Call-manager-fallback or telephony-service mode SRST
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False

4. What are the commands to configure an H323 GW?
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
#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
#test voice translation rule 1 <input to test>
Automatically configures the MGCP GW for you.

5. How would you verify that DHCP is working in IOS?
(config)#sh cdp neigh detail
CUCM Service Parameters --> Automated Alternate Routing Enable --> True
SERVICE PARAMETER> Automated Alternate Routing Enable > True
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'

6. Aside from the Media Resources --> Mobile Voice Access where else do you need to specify the the Mobile Voice Access DN?
(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
#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
Single Number Reach (Mobile Connect)
Service Parameters --> Mobile Voice Access Number

7. How can you confirm the MGCP GW is registered to CUCM - in IOS?
Sh ccm-manager
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
#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
#voice service voip| #no supplementary-service h225-notify cid-update

8. When a CUCM device dials a number - what happens?
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
8kb/s
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 .)
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable

9. What are two caveats to using the ccm-manager config server</ip> command?
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 .)
Bottom up - to prevent glare.

Mobile Voice Access

10. Name 4 useful show commands for active calls.
Service Parameter --> Block OffNet To OffNet Transfer --> True
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)

11. How do you place SCCP and SIP phones into a single huntgroup?
(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
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
On CUCM it's identical to adding an H323 GW.
Via the voice hunt-group parallel command

12. 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.
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)
Debug isdn q931
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie

13. How do you set the Call Park Reversion Timer?
CUCM Service Parameters --> Call Park Reversion Timer
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
sh ephone reg|and|debug voip dialpeer
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

14. How do you disable KPML?
Assign SIP Dial Rules
Proxy Line Mode has multiple icons on the phone.|Shared Line Mode has only one.
Show ccm-manager
1 ... this is not optional!

15. What are the commands to configure SIP phones in CME?
Reroute when here is WAN congestion.
In the CUCM 7.0.1 Release Notes ... search for restore.
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

16. How do you configure an MGCP GW? (router side)
(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
(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
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones

17. How do you ensure an H323 GW always uses the Sub as primary and Pub as a backup?
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie
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.
#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
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False

18. What does an H323 GW require that MGCP GWs do not?
Reroute when there is a WAN Outage.
Apply voice-class codec
Ccm-manager music-on-hold
Dial-peers

19. What are the basic ephone-dn and ephone commands?
SERVICE PARAMETER> Automated Alternate Routing Enable > True
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
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
When they are explicitly matched in a destination-pattern in a dial-peer.

20. How do you prevent H323 caller-id updates to CUCM
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
On CUCM it's identical to adding an H323 GW.
#voice service voip| #no supplementary-service h225-notify cid-update
Matches any length dialed number and truncates it to 4 digits.

21. What is the bit rate for a G.729 call excluding layer 2?
8kb/s
voice register pool|and|voice register dn
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage

22. Where can you find the command to restore any of the default IP Phone Services if they happen to have been deleted?
...
In CUCM - configure CFUR to point to it's E164 number.
(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
In the CUCM 7.0.1 Release Notes ... search for restore.

23. What does Display-IE do?
Sends the Calling Name.
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
Sh ip rsvp reservation||sh sccp connections

24. How do you prevent toll fraud on CME?
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
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)
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 ....

25. Where can you assign the AAR Group?
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
Higher
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.

26. How do you convert a full PRI 9config'd by ccm-manager config server) back to a Fractional PRI?
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.

(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
'Use before the ... so XXXX

27. How do you allow the Calling Name to be sent to the PSTN on a router?
Master/Slave relationship. CUCM controls it.
Apply it to the ephone.
voice translation-profile|and|voice translation-rule
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie

28. What are the basic SCCP Commands fro telephony-service in CUCME?
sh ephone reg|and|debug voip dialpeer
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
IP Voice Media Streaming App

29. What is CSIM?
Single Number Reach (Mobile Connect)
Call Simulator. You can use to validate path from router to the PSTN.
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit

30. On an MGCP GW - if you select Top Down under Channel Selection Order - What does that mean?
Top Down means that channel 1 will be the first channel used to place outgoing calls.
Assign a logout-profile to the ephone.
Auto Call Pickup Enabled
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

31. What are the 3 mandatory commands within call-manager-fallback?
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
Max-dn|max-ephone|ip source-address
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.

32. How do you get around relying on DNS for your CUCMs?
In the CUCM 7.0.1 Release Notes ... search for restore.
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
Auto Call Pickup Enabled

33. 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?
Reroute when here is WAN congestion.
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.

34. What is Phone NTP Reference used for?
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)#sh cdp neigh detail
#voice service voip| #no supplementary-service h225-notify cid-update
To notify SIP Phones of NTP

35. How do you verify that NTP is working on the CUCM server?
Higher
#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
Sends the Calling Name.
At the CLI: utils ntp status

36. 'How do you inform a SIP phone of NTP information?
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.

37. How do you prioritize route groups?
Put them in a route list.
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'
(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
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit

38. Two useful troubleshooting commands for CUCME?
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
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 .)
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie
sh ephone reg|and|debug voip dialpeer

39. How do you set up redundancy on outbound dial-peers on an H323 gateway?
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
Device Pool Locations
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
Configure it on the route group through the route list - then it will be local to the route list.

40. In Gatekeeper CAC how do you restrict a specific endpoint?
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
When multiple sites use the same route pattern - do your digit manipulation on a route list.

41. How do you see the details of calls coming in and out of the PRI?
Show ccm-manager
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
Debug isdn q931
Call-manager-fallback or telephony-service mode SRST

42. What CUCM services should you activate?
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
TRUE
#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
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).

43. When using GK redundancy - what must you do to ensure both SUB and PUB use port 1720 for call-signalling.

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44. A show isdn status shows TEI_ASSIGNED. What do you do to get MULTIPLE_FRAME_ESTABLISHED?
TRUE
Re-enter the mgcp bind control and mgcp bind media commands.
CUCM OS Administration Settings --> NTP Servers
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable

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

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46. How do you enable AAR?
SERVICE PARAMETER> Automated Alternate Routing Enable > True
Bandwidth
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
voice register pool|and|voice register dn

47. How do you use the # as a string terminator within a SIP Dial Rule?
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
Precede the # with a > ... so 9011*>#
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM

48. How would you enable security on a GK?
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
When they are explicitly matched in a destination-pattern in a dial-peer.
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
Need to Know||Anytime you have an external call - it needs to match on a route pattern.

49. With the gw-priority command - does higher or lower priority take precedence?
Higher
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 .)
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.
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie

50. Need to Know||Anytime you have an external call - it needs to match on a route pattern.
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
Assign SIP Dial Rules
Precede the # with a > ... so 9011*>#