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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?
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
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 ....

2. On an MGCP GW - how could you see the primary and backup CUCM servers?
CUCM OS Administration Settings --> NTP Servers
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
Show ccm-manager
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

3. What are the 3 mandatory commands within call-manager-fallback?
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files

Max-dn|max-ephone|ip source-address
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

4. How do you see the details of calls coming in and out of the PRI?
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
24kb/s
Configure it on the route group through the route list - then it will be local to the route list.
Debug isdn q931

5. If you're using Called/Calling Party Transformations at the Route Pattern - what happens if you do Digit manipulation at the route list?
The Called/Calling Transformations are superceded.
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
'Service Parameters --> Auto Answer Timer
24kb/s

6. 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)
#test voice translation rule 1 <input to test>
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
#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 is Phone NTP Reference used for?
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
To notify SIP Phones of NTP
Configure it on the route group through the route list - then it will be local to the route list.
Call-manager-fallback or telephony-service mode SRST

8. How is NTP sych setup in CUCM?
'Service Parameters --> Auto Answer Timer
CUCM OS Administration Settings --> NTP Servers
On CUCM it's identical to adding an H323 GW.
(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

9. Where do you use VIA zone?
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
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
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.

10. When can you not use a Standard Local Route Group?
Sends the Calling Name.
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
When configuring TEHO.
Assign a logout-profile to the ephone.

11. 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.
#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
Mobile Connect
Dial-peers

12. What is SIP URI?
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.
Phone number followed by domain name.|i.e. 3006@ipxcme.com
1 ... this is not optional!
It's best to strip digits at the voice port.

13. What types of digit manipulation can you perform at the route pattern?
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
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
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!

14. An MGCP gateway serving as an SRST router requires what?
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
Auto Call Pickup Enabled
Service Parameters --> Mobile Voice Access Number

15. How do you configure CUCM redundancy on an H323 gateway?
24kb/s
#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
CUCM Service Parameters --> Automated Alternate Routing Enable --> True
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs

16. How do you see multicast packets being sent?
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.
Debug ephone moh
#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
Redundant dial plan. One on CUCM and one on the routers via dial-peers.

17. How do you prevent H323 caller-id updates to CUCM
It's best to strip digits at the voice port.
#voice service voip| #no supplementary-service h225-notify cid-update
Call forwarding between voip to voip (when CUBE is in play)
Mobile Voice Access

18. In Gatekeeper CAC how do you restrict a specific endpoint?
Assign SIP Dial Rules
1 ... this is not optional!
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones

19. What are the steps to configure Single Number Reach and 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.
Outbound dial-peers

CUCM - Partitions and Calling Search Spaces||CME - COR Lists

20. What CUCM services should you activate?
Bandwidth
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
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
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.

21. In CUCME what SIP config command is equivalent to ephone and ephone-dn?
voice register pool|and|voice register dn
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
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
IP Voice Media Streaming App

22. 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?
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
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 (if no response within 3 seconds continue dial-peer hunting)

23. When you make a call and it results in a secondary dial-tone - What is this a symptom of?
No POTS dial-peer or no direct-inward-dial on a pots dial-peer

(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
Dtmf-relay h245-alpha

24. What are the commands to configure SRST in fallback?
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
voice translation-profile|and|voice translation-rule
Device Pool Locations
(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

25. Two useful troubleshooting commands for CUCME?
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
sh ephone reg|and|debug voip dialpeer
CUCM Service Parameters --> Call Park Reversion 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

26. How do you configure phone ports on an ESW?
Device Pool Locations
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
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
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

27. When using drop-through-option What is the max number of huntgroups?
Matches any length dialed number and truncates it to 4 digits.
1 ... this is not optional!
voice register pool|and|voice register dn
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage

28. How do you test a Voice Translation Rule?
#test voice translation rule 1 <input to test>
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
It's best to strip digits at the voice port.
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)

29. How much bandwidth does a G.729 call including layer 3 require?
#test voice translation rule 1 <input to test>
voice translation-profile|and|voice translation-rule
Apply voice-class codec
24kb/s

30. What are the commands to configure a SIP phone in CUCME?
Reroute when there is a WAN Outage.
Apply voice-class codec
SERVICE PARAMETER> Automated Alternate Routing Enable > 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

31. What's the difference between AAR and SRST?
#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
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.

32. 'By Nov. 16 - 2010||I am happy confident and thankful that I am now a CCIE Voice Certified engineer! My technical knowledge of the Cisco UC portfolio is truly unsurpassed. I have opened up a wealth of opportunities for myself and my family and
...
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie
Reroute when there is a WAN Outage.
Service Parameter --> Block OffNet To OffNet Transfer --> True

33. Privacy is enabled system-wide in CUCM by default. (T or F)
TRUE
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
Debug ephone moh
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable

34. How do you configure class of service (CoS) in CUCM? CME?
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
When configuring TEHO.
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
At the CLI: utils ntp status

35. Which takes precedence Device Locations or Device Pool Locations?
Debug isdn q931
Device Pool Locations
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie
Reroute when there is a WAN Outage.

36. What are the commands to ensure an H323 GW always uses the Sub as primary and Pub as a backup?
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
When configuring TEHO.
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

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

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38. What command is needed on a gateway for it to invoke the DSP to convert multicast MOH stream to TDM?
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
Reroute when there is a WAN Outage.
#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
Ccm-manager music-on-hold

39. How do you create a trunk on the switch side?
TRUE
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
Automatically configures the MGCP GW for you.
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify

40. How do you configure SIP phones to be able to call other SIP phones via SIP URI?
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
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
SIP Route Pattern over a SIP Trunk.
Max-dn|max-ephone|ip source-address

41. Describe the relationship between route patterns and end devices.
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
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.
Matches any length dialed number and truncates it to 4 digits.

42. On an MGCP GW - if you select Top Down under Channel Selection Order - What does that mean?
CUCM Service Parameters --> Automated Alternate Routing Enable --> True
Debug isdn q931
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
Top Down means that channel 1 will be the first channel used to place outgoing calls.

43. 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?
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
Via the voice hunt-group parallel command
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
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)

44. How do you place SCCP and SIP phones into a single huntgroup?
'Service Parameters --> Auto Answer Timer
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
Via the voice hunt-group parallel command

45. When do you do digit manipulation at the route pattern as opposed to the route list?
Master/Slave relationship. CUCM controls it.
When multiple sites use the same route pattern - do your digit manipulation on a route list.
Dial-peers
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

46. Aside from the Media Resources --> Mobile Voice Access where else do you need to specify the the Mobile Voice Access DN?
(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
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
Service Parameters --> Mobile Voice Access Number

47. How do you configure DHCP in IOS?
In the CUCM 7.0.1 Release Notes ... search for restore.
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
(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
Assign SIP Dial Rules

48. What does Display-IE do?
When they are explicitly matched in a destination-pattern in a dial-peer.
The Called/Calling Transformations are superceded.
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
Sends the Calling Name.

49. What's the best way to do digit manipulation on an IOS gateway?

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

50. How do you use an ephone template?
Apply it to the ephone.
Top Down means that channel 1 will be the first channel used to place outgoing calls.

When multiple sites use the same route pattern - do your digit manipulation on a route list.