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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 convert a full PRI 9config'd by ccm-manager config server) back to a Fractional PRI?
Call-manager-fallback or telephony-service mode SRST

Automatically configures the MGCP GW for you.
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3

2. On an MGCP GW - if you select Top Down under Channel Selection Order - What does that mean?
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
Top Down means that channel 1 will be the first channel used to place outgoing calls.
8kb/s
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.

3. What's the best way to perform digit manipulation on a route group?
Configure it on the route group through the route list - then it will be local to the route list.
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)
The Called/Calling Transformations are superceded.
'Service Parameters --> Auto Answer Timer

4. How do you see multicast packets being sent?
Debug ephone moh
IP Voice Media Streaming App
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
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

5. How do you enable AAR system wide?
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
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
CUCM Service Parameters --> Automated Alternate Routing Enable --> True
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.

6. What are the commands to ensure an H323 GW always uses the Sub as primary and Pub as a backup?
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
#voice class h323 1| #h225 timeout tcp establish 3||#dial-peer voice 3000 voip| #destination-pattern 3...| # voice-class h323 1| #session target ipv4:10.1.5.3 (sub)| #dtmf-relay h245-alpha||#dial-peer voice 30001 voip| #destination-pattern 3...| #pre
#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
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

7. When you make a call and it results in a secondary dial-tone - What is this a symptom of?
sh ephone reg|and|debug voip dialpeer
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
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.
Sends the Calling Name.

8. How do you configure AAR?
Single Number Reach (Mobile Connect)
Mobile Connect
Put them in a route list.
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.

9. Two useful troubleshooting commands for CUCME?
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 .)
sh ephone reg|and|debug voip dialpeer
Call forwarding between voip to voip (when CUBE is in play)
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow

10. Privacy is enabled system-wide in CUCM by default. (T or F)
#test voice translation rule 1 <input to test>
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
TRUE
#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

11. What would force you to use telephony-service to configure SRST?
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
...
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
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup

12. With the gw-priority command - does higher or lower priority take precedence?
'Service Parameters --> Auto Answer Timer
(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
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
Higher

13. What does an H323 GW require that MGCP GWs do not?
Assign SIP Dial Rules
Dial-peers
Precede the # with a > ... so 9011*>#
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow

14. How do you setup AutoRegistration in CUCM?
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
Sends the Calling Name.
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
Apply it to the ephone.

15. What are the commands to configure NTP in IOS?
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
(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
Matches any length dialed number and truncates it to 4 digits.
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable

16. What are the base telephony-service commands for CME?
#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 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
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files

17. What are the steps to integrate CUPS with CUCM?
Phone number followed by domain name.|i.e. 3006@ipxcme.com
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
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
It's best to strip digits at the voice port.

18. How do you get around relying on DNS for your CUCMs?
Bottom up - to prevent glare.
'Service Parameters --> Auto Answer Timer
24kb/s
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs

19. SNR is also known as?
Outbound dial-peers
Mobile Connect
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.

20. How do you prevent toll fraud on CME?
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 ....
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
SIP Route Pattern over a SIP Trunk.

21. When using drop-through-option What is the max number of huntgroups?
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
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
To notify SIP Phones of NTP
1 ... this is not optional!

22. 'If you're not getting a DHCP address from CUCM what then?

It's best to strip digits at the voice port.
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
#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

23. What is CSIM?
sh ephone reg|and|debug voip dialpeer
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
When multiple sites use the same route pattern - do your digit manipulation on a route list.
Call Simulator. You can use to validate path from router to the PSTN.

24. How do you prevent H323 caller-id updates to CUCM
CUCM Service Parameters --> Call Park Reversion Timer
#voice service voip| #no supplementary-service h225-notify cid-update
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name
Automatically configures the MGCP GW for you.

25. Does CUCM support RSVP natively?
#voice service voip| #no supplementary-service h225-notify cid-update
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
CUCM Service Parameters --> Call Park Reversion Timer
Single Number Reach (Mobile Connect)

26. What types of digit manipulation can you perform at the route pattern?
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
#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
Top Down means that channel 1 will be the first channel used to place outgoing calls.

27. What are the commands to configure SRST in fallback?
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
(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> Automated Alternate Routing Enable > True
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM

28. If you have an H323 Gateway at a siet where the phones are controlled by CUCM - what do you need from a dial-peer perspective?
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
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.
Debug isdn q931
Phone number followed by domain name.|i.e. 3006@ipxcme.com

29. When it comes to H323 gateways - what should you always change - unless explicitly told not to?
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
CUCM Service Parameters --> Call Park Reversion Timer
Call forwarding between voip to voip (when CUBE is in play)

30. How do you support multiple codecs on a dialpeer?
(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
In the CUCM 7.0.1 Release Notes ... search for restore.
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
Apply voice-class codec

31. In a SIP Dial Rule how do you represent a dialed * instead of it being used as a wildcard?

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32. Which takes precedence Device Locations or Device Pool Locations?
Bottom up - to prevent glare.
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'
(config)#voice register dialplan
Device Pool Locations

33. How do you ensure no inter-digit timeout fro SIP phones within CUCM?
sh ephone reg|and|debug voip dialpeer
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
Higher
SIP Dial Rules

34. How do you ensure an H323 GW always uses the Sub as primary and Pub as a backup?
Single Number Reach (Mobile Connect)
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 .)
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.
#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

35. What does the Transfer On-hook Enabled Service Parameter do?
(config)#sh cdp neigh detail
Allows you to transfer by only pressing the Transfer button once.
#test voice translation rule 1 <input to test>
When multiple sites use the same route pattern - do your digit manipulation on a route list.

36. When a CUCM device dials a number - what happens?
SERVICE PARAMETER> Automated Alternate Routing Enable > True
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
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

37. When are digits stripped in a gateway?
When they are explicitly matched in a destination-pattern in a dial-peer.
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
Proxy Line Mode has multiple icons on the phone.|Shared Line Mode has only one.
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.

38. How do you configure SIP phones to be able to call other SIP phones via SIP URI?
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
SIP Route Pattern over a SIP Trunk.
8kb/s
CUCM Service Parameters --> Automated Alternate Routing Enable --> True

39. What are the commands to configure an H323 GW?
1 ... this is not optional!
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
sh ephone reg|and|debug voip dialpeer
#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

40. What is the Enable Enterprise Feature Access Service Parameter used for?
To enable two-stage dialing.
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.

41. What are the basic ephone-dn and ephone commands?
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
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
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

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

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43. What are the steps to configure Single Number Reach and Mobile Voice Access?
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.
Debug isdn q931
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.

44. What CUCM services should you activate?
Re-enter the mgcp bind control and mgcp bind media commands.
(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
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
Bottom up - to prevent glare.

45. Name 2 commands to verify RSVP functionality.
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
Automatically configures the MGCP GW for you.
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
Sh ip rsvp reservation||sh sccp connections

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

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47. What CM Service needs to be start in Serviceability for MOH to work?
IP Voice Media Streaming App
Top Down means that channel 1 will be the first channel used to place outgoing calls.
The name configuration field in ephone-dn 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.

48. What is a best practice for digit manipulation - in regards to H323 GWs?
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
Show ccm-manager
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1

49. How do you allow H323 calls to be preserved should the primary H323 GW fail?
Device Pool Locations
Assign a logout-profile to the ephone.
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>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False

50. What do you need to do to activate the CME GUI?
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
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify