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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 test a Voice Translation Rule?
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.
#test voice translation rule 1 <input to test>
(config)#voice register dialplan
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!

2. How do you see multicast packets being sent?
sh ephone reg|and|debug voip dialpeer
#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
Debug ephone moh
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!

3. How do you see the details of calls coming in and out of the PRI?
Mobile Connect
Debug isdn q931
Call Simulator. You can use to validate path from router to the PSTN.
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.

4. A show isdn status shows TEI_ASSIGNED. What do you do to get MULTIPLE_FRAME_ESTABLISHED?
Debug ephone moh
Proxy Line Mode has multiple icons on the phone.|Shared Line Mode has only one.
Re-enter the mgcp bind control and mgcp bind media commands.
Bandwidth

5. How is NTP sych setup in CUCM?
In the CUCM 7.0.1 Release Notes ... search for restore.
(config)#voice register dialplan
#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
CUCM OS Administration Settings --> NTP Servers

6. What is a best practice for digit manipulation - in regards to H323 GWs?
SERVICE PARAMETER> Automated Alternate Routing Enable > True
Re-enter the mgcp bind control and mgcp bind media commands.
In CUCM - configure CFUR to point to it's E164 number.
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.

7. An MGCP gateway serving as an SRST router requires what?
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
When multiple sites use the same route pattern - do your digit manipulation on a route list.
Bottom up - to prevent glare.
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.

8. How do you create a trunk on the switch side?
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable
When configuring TEHO.
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files

9. How do you block calls under call-manager-fallback?
voice translation-profile|and|voice translation-rule
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
#after-hours block pattern
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files

10. 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?
Allows you to transfer by only pressing the Transfer button once.
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)
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
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

11. 'If you're not getting a DHCP address from CUCM what then?
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
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
voice register pool|and|voice register dn
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs

12. What are the commands to configure a MGCP Gateway? (router)
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
IP Voice Media Streaming App
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
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'

13. How do you configure SRST?
Call-manager-fallback or telephony-service mode SRST
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 ....
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
#test voice translation rule 1 <input to test>

14. What's the difference between AAR and SRST?
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
Service Parameter --> Block OffNet To OffNet Transfer --> True
Re-enter the mgcp bind control and mgcp bind media commands.
Max-dn|max-ephone|ip source-address

15. Does CUCM support RSVP natively?
Service Parameters --> Mobile Voice Access Number
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
+ [CC 1-3 digits] [National Number max 15 minus CC digits]

16. Name 2 commands to verify RSVP functionality.
#test voice translation rule 1 <input to test>
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
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.
Sh ip rsvp reservation||sh sccp connections

17. Privacy is enabled system-wide in CUCM by default. (T or F)
(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
TRUE
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
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.

18. If the PSTN is presenting on channel 1 - should you configure CUCM to search 'top down' or 'bottom up'?
#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
Bottom up - to prevent glare.
When they are explicitly matched in a destination-pattern in a dial-peer.
Redundant dial plan. One on CUCM and one on the routers via dial-peers.

19. What are the base telephony-service commands for CME?
Debug isdn q931

Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
Bottom up - to prevent glare.

20. How do you disable KPML?
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group

Assign SIP Dial Rules
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.

21. How would you enable security on a GK?
When multiple sites use the same route pattern - do your digit manipulation on a route list.
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
Precede the # with a > ... so 9011*>#
...

22. What are the commands to create vlans on an ESW?
Apply it to the ephone.
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit
Sh ccm-manager
Precede the # with a > ... so 9011*>#

23. How do you ensure no inter-digit timeout fro SIP phones within 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.
sh ephone reg|and|debug voip dialpeer
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
SIP Dial Rules

24. What does an H323 GW require that MGCP GWs do not?
Dial-peers
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
At the CLI: utils ntp status
Automatically configures the MGCP GW for you.

25. How do you prevent toll fraud on CUCM?
Device Pool Locations
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.

26. 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?
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
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
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
#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

27. How do you configure a SIP Trunk? (router side)
Mobile Voice Access
'Use before the ... so XXXX
(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
Matches any length dialed number and truncates it to 4 digits.

28. 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.
#voice service voip| #no supplementary-service h225-notify cid-update
8kb/s
Debug isdn q931

29. What CUCM services should you activate?
(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
Reroute when there is a WAN Outage.
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
24kb/s

30. What terminology translates to AAR?
Reroute when here is WAN congestion.
(config)#voice register dialplan
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.

31. How do you use the # as a string terminator within a SIP Dial Rule?
Precede the # with a > ... so 9011*>#
CUCM Service Parameters --> Call Park Reversion Timer
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
When configuring TEHO.

32. How do you set the Call Park Reversion Timer?
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
CUCM Service Parameters --> Call Park Reversion Timer
SIP Route Pattern over a SIP Trunk.
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast

33. Describe how you configure SIP URI functionality.
Debug isdn q931
Bottom up - to prevent glare.
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

34. Describe the relationship between route patterns and end devices.
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.
SIP Dial Rules
'Service Parameters --> Auto Answer Timer
Allows you to transfer by only pressing the Transfer button once.

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

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36. When a CUCM device dials a number - what happens?
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.
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
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 .)
Service Parameters --> Mobile Voice Access Number

37. When are digits stripped in a gateway?
When they are explicitly matched in a destination-pattern in a dial-peer.
#after-hours block pattern
SIP Dial Rules
Sh ip rsvp reservation||sh sccp connections

38. What do you need to do to activate the CME GUI?
To enable two-stage dialing.
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
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
8kb/s

39. How do you use an ephone template?
Apply it to the ephone.
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
SIP Dial Rules
Configure it on the route group through the route list - then it will be local to the route list.

40. 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?
...
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
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.
Need to Know||Anytime you have an external call - it needs to match on a route pattern.

41. What are the commands to configure a SIP phone in CUCME?
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
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
Dtmf-relay h245-alpha

42. In Gatekeeper CAC how do you restrict a specific endpoint?
(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
CUCM OS Administration Settings --> NTP Servers
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||#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

43. What are the commands to manually configure an MGCP gateway?
#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
(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
#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
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files

44. 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 os truly unsurpassed. I have opened up a wealth of opportunities for myself and my family and
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)
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
...
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 ....

45. What is Mobile Voice Access?
(config)#voice register dialplan
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify

46. What commands are needed to configure the voice register pool in CME?
Service Parameter --> Block OffNet To OffNet Transfer --> True
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
#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 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

47. Calls coming from CUCM to PSTN need what?
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
Outbound dial-peers

1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup

48. On an H323 GW - how do you adjust the timers for redundancy hunting?
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast

49. How do you configure CUCM redundancy on an H323 gateway?
#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
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False

50. Is the order of the MRGs in an MRGL significant?
(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
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
(config)#voice register dialplan