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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. With the gw-priority command - does higher or lower priority take precedence?
Higher
Debug ephone moh
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 register pool|and|voice register dn

2. How do you get around relying on DNS for your CUCMs?
Sends the Calling Name.
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
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

3. How do you configure SIP phones to be able to call other SIP phones via SIP URI?
Max-dn|max-ephone|ip source-address
SIP Route Pattern over a SIP Trunk.
SERVICE PARAMETER> Automated Alternate Routing Enable > True
No POTS dial-peer or no direct-inward-dial on a pots dial-peer

4. What is Mobile Voice Access?
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
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
When they are explicitly matched in a destination-pattern in a dial-peer.
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.

5. What is call-forward pattern used for?
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
Re-enter the mgcp bind control and mgcp bind media commands.
Call forwarding between voip to voip (when CUBE is in play)
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.

6. An MGCP gateway serving as an SRST router requires what?
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
8kb/s
Automatically configures the MGCP GW for you.
#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

7. What terminology translates to AAR?
Reroute when here is WAN congestion.
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
Show ccm-manager
Re-enter the mgcp bind control and mgcp bind media commands.

8. Is the order of the MRGs in an MRGL significant?
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
Sends the Calling Name.
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name

9. How is NTP sych setup in CUCM?
CUCM OS Administration Settings --> NTP Servers
sh ephone reg|and|debug voip dialpeer
'Use before the ... so XXXX
Show ccm-manager

10. A show isdn status shows TEI_ASSIGNED. What do you do to get MULTIPLE_FRAME_ESTABLISHED?
Service Parameters --> Mobile Voice Access Number
In CUCM - configure CFUR to point to it's E164 number.
When multiple sites use the same route pattern - do your digit manipulation on a route list.
Re-enter the mgcp bind control and mgcp bind media commands.

11. What are the commands to configure a MGCP Gateway? (router)
Outbound dial-peers
TRUE
Put them in a route list.
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

12. How do you place SCCP and SIP phones into a single huntgroup?
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
Configure it on the route group through the route list - then it will be local to the route list.
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
Via the voice hunt-group parallel command

13. How do you set up redundancy on outbound dial-peers on an H323 gateway?
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
Master/Slave relationship. CUCM controls it.
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)

14. What is the bit rate for a G.729 call excluding layer 2?
8kb/s
Service Parameter --> Block OffNet To OffNet Transfer --> True
Auto Call Pickup Enabled
(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

15. What are the commands to configure a SIP phone in CUCME?
Max-dn|max-ephone|ip source-address
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
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
To notify SIP Phones of NTP

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

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17. How do you configure AAR?
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow

18. What are the steps to configure Single Number Reach and Mobile Voice Access?
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast

19. Maximum Wait Time for Desk Pickup?
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
#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
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
...

20. On an H323 GW - how do you adjust the timers for redundancy hunting?
#voice class h323 1| #h225 timeout tcp establish 3||#dial-peer voice 3000 voip| #destination-pattern 3...| # voice-class h323 1| #session target ipv4:10.1.5.3 (sub)| #dtmf-relay h245-alpha||#dial-peer voice 30001 voip| #destination-pattern 3...| #pre
Call forwarding between voip to voip (when CUBE is in play)
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3

21. How would you enable security on a GK?
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
Max-dn|max-ephone|ip source-address
In the CUCM 7.0.1 Release Notes ... search for restore.
It's best to strip digits at the voice port.

22. What is the Enable Enterprise Feature Access Service Parameter used for?
To enable two-stage dialing.
...
#after-hours block pattern
Allows you to transfer by only pressing the Transfer button once.

23. How do you configure a gateway to register with gatekeeper?
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
#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
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage

24. What would force you to use telephony-service to configure SRST?
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
Bandwidth
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup

25. Name 4 useful show commands for active calls.
When configuring TEHO.
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary

26. How do you configure phone ports on an ESW?
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
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
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
Precede the # with a > ... so 9011*>#

27. Aside from the Media Resources --> Mobile Voice Access where else do you need to specify the the Mobile Voice Access DN?
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
Sh ccm-manager
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
Service Parameters --> Mobile Voice Access Number

28. Does CUCM support RSVP natively?
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
It's best to strip digits at the voice port.
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group

29. 'How do you inform a SIP phone of NTP information?
#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
Device Pool Locations
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group

30. When you make a call and it results in a secondary dial-tone - What is this a symptom of?
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
Assign SIP Dial Rules
(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
No POTS dial-peer or no direct-inward-dial on a pots dial-peer

31. 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).
(config)#sh cdp neigh detail
In CUCM - configure CFUR to point to it's E164 number.
To enable two-stage dialing.

32. How do you configure an MGCP GW? (router side)
#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
Show ccm-manager
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
(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

33. What is CSIM?
Higher
#test voice translation rule 1 <input to test>
Call Simulator. You can use to validate path from router to the PSTN.
Debug isdn q931

34. On the RDP What is the CSS used for?
Mobile Voice Access
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'
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.
#test voice translation rule 1 <input to test>

35. What's the best way to do digit manipulation on an IOS gateway?
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
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 translation-profile|and|voice translation-rule

36. How do you prevent toll fraud on CUCM?
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
Allows you to transfer by only pressing the Transfer button once.
In the CUCM 7.0.1 Release Notes ... search for restore.
Via the voice hunt-group parallel command

37. What dtmf-relay type do you use for an H323 GW?
Apply it to the ephone.
Dtmf-relay h245-alpha
(config)#voice register dialplan
It's best to strip digits at the voice port.

38. How do you set the Call Park Reversion Timer?
...
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
CUCM Service Parameters --> Call Park Reversion Timer
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary

39. What are the base telephony-service commands for CME?
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
The name configuration field in ephone-dn and voice register dn
To enable two-stage dialing.
Assign a logout-profile to the ephone.

40. In Gatekeeper CAC how do you restrict a specific endpoint?
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
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 .)
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)

41. How would you verify that DHCP is working in IOS?
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
(config)#sh cdp neigh detail
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
Sh ip rsvp reservation||sh sccp connections

42. 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?
Assign a logout-profile to the ephone.
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.
Ccm-manager music-on-hold
CUCM Service Parameters --> Automated Alternate Routing Enable --> True

43. What are the commands to ensure an H323 GW always uses the Sub as primary and Pub as a backup?
#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 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
(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
SERVICE PARAMETER> Automated Alternate Routing Enable > True

44. What does an H323 GW require that MGCP GWs do not?
Dial-peers
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable
...
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.

45. 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.
(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*>#
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones

46. What does KPML do?
The name configuration field in ephone-dn and voice register dn
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 service voip| #no supplementary-service h225-notify cid-update
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.

47. On the RDP What is the Rerouting CSS used for?
Single Number Reach (Mobile Connect)
Apply voice-class codec
#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
Automatically configures the MGCP GW for you.

48. 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
voice translation-profile|and|voice translation-rule
Reroute when there is a WAN Outage.

49. Two useful troubleshooting commands for CUCME?
Allows you to transfer by only pressing the Transfer button once.
Single Number Reach (Mobile Connect)
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
sh ephone reg|and|debug voip dialpeer

50. Describe how you configure SIP URI functionality.
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
SERVICE PARAMETER> Automated Alternate Routing Enable > True