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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 would you enable security on a GK?
It's best to strip digits at the voice port.
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
Bottom up - to prevent glare.
SIP Dial Rules

2. What must you do for a BACD script to work on a CME router?
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
Sends the Calling Name.
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au

3. When a CUCM device dials a number - what happens?
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'
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 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
Debug isdn q931

4. What are two caveats to using the ccm-manager config server</ip> command?

Reroute when there is a WAN Outage.
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
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)

5. How do you verify that NTP is working on the CUCM server?
SIP Route Pattern over a SIP Trunk.
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.
IP Voice Media Streaming App
At the CLI: utils ntp status

6. How can you confirm the MGCP GW is registered to CUCM - in IOS?
Precede the # with a > ... so 9011*>#
Sh ccm-manager
Service Parameter --> Block OffNet To OffNet Transfer --> True
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable

7. When configuring a Gatekeep-controlled trunk - what do you do with the Wait for Far End H.245 TCS option?
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
...
Higher
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.

8. What is a best practice for digit manipulation - in regards to H323 GWs?
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.

9. When it comes to H323 gateways - what should you always change - unless explicitly told not to?
Debug isdn q931
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False

10. Name 4 useful show commands for active calls.
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
In CUCM - configure CFUR to point to it's E164 number.
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

11. How do you see multicast packets being sent?
Debug ephone moh
Allows you to transfer by only pressing the Transfer button once.
Bottom up - to prevent glare.
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 .)

12. What are the commands to configure a T1/E1 PRI?
The name configuration field in ephone-dn and voice register dn
(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
#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
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.

13. What does the Transfer On-hook Enabled Service Parameter do?
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.
Allows you to transfer by only pressing the Transfer button once.
Sh ip rsvp reservation||sh sccp connections
Sends the Calling Name.

14. What are the commands to configure an H323 GW?
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
#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

15. What commands are needed to configure the voice register pool in CME?
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 .)
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
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
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.

16. On the RDP What is the Rerouting CSS used for?
Single Number Reach (Mobile Connect)
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
Matches any length dialed number and truncates it to 4 digits.
#after-hours block pattern

17. What are the commands to set up the PRI?

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18. On a gatekeeper trunk - how do you ensure the Sub is used as primary and Pub as backup?
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
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
Mobile Connect

19. How do you setup AutoRegistration in CUCM?

Higher
Assign SIP Dial Rules
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP

20. 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?
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)
Outbound dial-peers
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
Assign SIP Dial Rules

21. On an H323 GW - how do you adjust the timers for redundancy hunting?
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
Phone number followed by domain name.|i.e. 3006@ipxcme.com
CUCM Service Parameters --> Call Park Reversion Timer

22. What does KPML do?
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
In CUCM - configure CFUR to point to it's E164 number.
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
Sh ip rsvp reservation||sh sccp connections

23. What CUCM services should you activate?
1 ... this is not optional!
#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
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
SERVICE PARAMETER> Automated Alternate Routing Enable > True

24. Where can you find the command to restore any of the default IP Phone Services if they happen to have been deleted?
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
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
In the CUCM 7.0.1 Release Notes ... search for restore.
#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

25. How do you ensure that G.711 only is used?
voice register pool|and|voice register dn
Ccm-manager music-on-hold
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable

26. How would you verify that DHCP is working in IOS?
SIP Route Pattern over a SIP Trunk.
(config)#sh cdp neigh detail
Bandwidth
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.

27. In CUCME what SIP config command is equivalent to ephone and ephone-dn?
Apply voice-class codec
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
It's best to strip digits at the voice port.
voice register pool|and|voice register dn

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

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29. How do you enable AAR?
To notify SIP Phones of NTP
SERVICE PARAMETER> Automated Alternate Routing Enable > True
voice translation-profile|and|voice translation-rule
Dtmf-relay h245-alpha

30. What does Display-IE do?
Outbound dial-peers
Sends the Calling Name.
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
Reroute when there is a WAN Outage.

31. How do you block an external call from being transferred back out to the pstn by an internal user?
Service Parameter --> Block OffNet To OffNet Transfer --> True
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
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup

32. What is the Service Parameter to allow the phone that is picking ip to auto answer?
Dial-peers
Call forwarding between voip to voip (when CUBE is in play)
Auto Call Pickup Enabled
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow

33. How do you ensure no inter-digit timeout fro SIP phones within CUCM?
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
Mobile Voice Access
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
SIP Dial Rules

34. How do you support multiple codecs on a dialpeer?
Apply voice-class codec
sh ephone reg|and|debug voip dialpeer
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
Re-enter the mgcp bind control and mgcp bind media commands.

35. What is Mobile Voice Access?
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
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
Proxy Line Mode has multiple icons on the phone.|Shared Line Mode has only one.
#test voice translation rule 1 <input to test>

36. On an MGCP GW - if you select Top Down under Channel Selection Order - What does that mean?
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
Show ccm-manager
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
Top Down means that channel 1 will be the first channel used to place outgoing calls.

37. What are the commands to configure NTP in IOS?
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
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
Outbound dial-peers
#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

38. What dtmf-relay type do you use for an H323 GW?
To enable two-stage dialing.
Reroute when here is WAN congestion.
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
Dtmf-relay h245-alpha

39. Describe how you configure SIP URI functionality.
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
Mobile Connect
When configuring TEHO.

40. How do you test a Voice Translation Rule?
...
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.
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.
#test voice translation rule 1 <input to test>

41. Does CUCM support RSVP natively?
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)
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
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.

42. On an MGCP GW - how could you see the primary and backup CUCM servers?
Show ccm-manager
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
TRUE
Call Simulator. You can use to validate path from router to the PSTN.

43. What are the commands to configure a MGCP Gateway? (router)
Service Parameters --> Mobile Voice Access Number
(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
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
At the CLI: utils ntp status

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

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.
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow

45. What is the full E164 format?
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
Top Down means that channel 1 will be the first channel used to place outgoing calls.
Mobile Voice Access

46. How do you configure phone ports on a 3750?
Apply voice-class codec
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.
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast

47. What does ccm-manager config server [IP]</ip> do?
Device Pool Locations
Automatically configures the MGCP GW for you.
Top Down means that channel 1 will be the first channel used to place outgoing calls.
Re-enter the mgcp bind control and mgcp bind media commands.

48. How do you configure DHCP in IOS?

Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.
(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
(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

49. How do you configure CUCM redundancy on an H323 gateway?
Service Parameter --> Block OffNet To OffNet Transfer --> True
(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
Dial-peers
#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

50. 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.
In the CUCM 7.0.1 Release Notes ... search for restore.
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
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