Test your basic knowledge |

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. What is call-forward pattern used for?
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
The name configuration field in ephone-dn and voice register dn
Call forwarding between voip to voip (when CUBE is in play)
Single Number Reach (Mobile Connect)

2. What kind of relationship does an MGCP gateway have with CUCM?

Allows you to transfer by only pressing the Transfer button once.
Master/Slave relationship. CUCM controls it.
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage

3. Which takes precedence Device Locations or Device Pool Locations?
24kb/s
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
Device Pool Locations

4. 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
Re-enter the mgcp bind control and mgcp bind media commands.
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 register pool|and|voice register dn
...

5. When do you use translate called? Translate calling?
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)
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
When they are explicitly matched in a destination-pattern in a dial-peer.

6. What are the commands to create the L3 routing interface for VLANS (SVI)?
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
Reroute when there is a WAN Outage.
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
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

7. What are the steps to configure Single Number Reach and Mobile Voice Access?
(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
Max-dn|max-ephone|ip source-address

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

8. What are the commands to configure an H323 GW?
...
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
#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
Need to Know||Anytime you have an external call - it needs to match on a route pattern.

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

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10. If you're using Called/Calling Party Transformations at the Route Pattern - what happens if you do Digit manipulation at the route list?
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
The Called/Calling Transformations are superceded.

11. With the gw-priority command - does higher or lower priority take precedence?
Allows you to transfer by only pressing the Transfer button once.
Higher
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.

12. Where can you assign the AAR Group?
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
Service Parameters --> Mobile Voice Access Number
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
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

13. In CUCME what SIP config command is equivalent to ephone and ephone-dn?
Debug isdn q931
voice register pool|and|voice register dn
Call Simulator. You can use to validate path from router to the PSTN.
#test voice translation rule 1 <input to test>

14. Name 2 commands to verify RSVP functionality.
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.
Sh ip rsvp reservation||sh sccp connections
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
Precede the # with a > ... so 9011*>#

15. Maximum Wait Time for Desk Pickup?
#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
24kb/s
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
Re-enter the mgcp bind control and mgcp bind media commands.

16. How do you verify where MOH is being served up from?

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17. What is a best practice for digit manipulation - in regards to H323 GWs?
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
On CUCM it's identical to adding an H323 GW.
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.

18. What does KPML do?
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
Sends every digit to CUCM in real-time with digit-analysis being handled by 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.

19. How do you verify that NTP is working on the CUCM server?
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
Call-manager-fallback or telephony-service mode SRST
At the CLI: utils ntp status
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST

20. How do you use an ephone template?
Call Simulator. You can use to validate path from router to the PSTN.
Apply it to the ephone.
On CUCM it's identical to adding an H323 GW.
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 .)

21. How do you prevent toll fraud on CME?
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
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 ....
Bottom up - to prevent glare.

22. How do you set the inter-digit timeout for SIP phones in CME?
Mobile Voice Access

(config)#voice register dialplan
sh ephone reg|and|debug voip dialpeer

23. How do you ensure that G.711 only is used?
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
Reroute when here is WAN congestion.
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False

24. What command is needed on a gateway for it to invoke the DSP to convert multicast MOH stream to TDM?
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
sh ephone reg|and|debug voip dialpeer
Ccm-manager music-on-hold

25. A show isdn status shows TEI_ASSIGNED. What do you do to get MULTIPLE_FRAME_ESTABLISHED?
To enable two-stage dialing.
Re-enter the mgcp bind control and mgcp bind media commands.
Service Parameters --> Mobile Voice Access Number
(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

26. What are the commands to manually configure an MGCP gateway?
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
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.
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
#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

27. How do you allow the Calling Name to be sent to the PSTN on a router?
Top Down means that channel 1 will be the first channel used to place outgoing calls.
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
#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)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie

28. What are the commands to ensure an H323 GW always uses the Sub as primary and Pub as a backup?
Allows you to transfer by only pressing the Transfer button once.

#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
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

29. How would you verify that DHCP is working in IOS?
(config)#sh cdp neigh detail
#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
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP

30. Is the + character supported on a VOIP dial-peer?

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31. What is the full E164 format?
Assign SIP Dial Rules
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
#voice service voip| #no supplementary-service h225-notify cid-update

32. What does rule 1 /^.*(....$)/ /1/ do?
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'
1 ... this is not optional!
Matches any length dialed number and truncates it to 4 digits.

33. How do you set up redundancy on outbound dial-peers on an H323 gateway?
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.
Mobile Voice Access

#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)

34. What is Phone NTP Reference used for?
TRUE
To notify SIP Phones of NTP
Top Down means that channel 1 will be the first channel used to place outgoing calls.
SIP Dial Rules

35. 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
CUCM OS Administration Settings --> NTP Servers
1 ... this is not optional!
Sh ccm-manager

36. 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)
voice register pool|and|voice register dn
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
CUCM OS Administration Settings --> NTP Servers

37. What are the commands to configure a MGCP Gateway? (router)
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
Via the voice hunt-group parallel command
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False

38. What CM Service needs to be start in Serviceability for MOH to work?
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
IP Voice Media Streaming App
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
#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

39. When a CUCM device dials a number - what happens?
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
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 .)
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

40. 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.
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain 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|(config-controller)#no shut||(config)#voice service voip|(conf-voi-serv)#sip|(conf-serv-sip)#bind
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.

41. How do you configure DHCP in IOS?
(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
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)
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.

42. 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
(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
Debug ephone moh
Sh ip rsvp reservation||sh sccp connections

43. What are the basic SCCP Commands fro telephony-service in CUCME?
Via the voice hunt-group parallel command
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
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
Matches any length dialed number and truncates it to 4 digits.

44. How do you configure SIP phones to be able to call other SIP phones via SIP URI?
SIP Route Pattern over a SIP Trunk.
Allows you to transfer by only pressing the Transfer button once.
Device Pool Locations
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.

45. How do you see the details of calls coming in and out of the PRI?
Master/Slave relationship. CUCM controls it.
Sends the Calling Name.
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
Debug isdn q931

46. Privacy is enabled system-wide in CUCM by default. (T or F)

No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
TRUE
Mobile Connect

47. Two useful troubleshooting commands for CUCME?
Debug isdn q931
The Called/Calling Transformations are superceded.

sh ephone reg|and|debug voip dialpeer

48. How do you support multiple codecs on a dialpeer?
Apply voice-class codec
(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
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3

49. How do do configure TEHO?
In CUCM - configure CFUR to point to it's E164 number.
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
Bottom up - to prevent glare.
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

50. How do you test a Voice Translation Rule?
#test voice translation rule 1 <input to test>
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
Show ccm-manager