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. How is NTP sych setup in CUCM?
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable
24kb/s
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
CUCM OS Administration Settings --> NTP Servers

2. How do you configure an MGCP GW? (router side)
Apply it to the ephone.
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name
(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
Master/Slave relationship. CUCM controls it.

3. How do you support multiple codecs on a dialpeer?
Call forwarding between voip to voip (when CUBE is in play)
To enable two-stage dialing.
Apply voice-class codec
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

4. How do you convert a full PRI 9config'd by ccm-manager config server) back to a Fractional PRI?

#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
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
Dtmf-relay h245-alpha

5. How do you ensure an H323 GW always uses the Sub as primary and Pub as a backup?
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
To enable two-stage dialing.
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.
Automatically configures the MGCP GW for you.

6. SNR is also known as?
To enable two-stage dialing.
Master/Slave relationship. CUCM controls it.
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
Mobile Connect

7. How do you test a Voice Translation Rule?
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
#test voice translation rule 1 <input to test>
Single Number Reach (Mobile Connect)
In the CUCM 7.0.1 Release Notes ... search for restore.

8. What does rule 1 /^.*(....$)/ /1/ do?
Matches any length dialed number and truncates it to 4 digits.

Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
In the CUCM 7.0.1 Release Notes ... search for restore.

9. On an H323 GW - how do you adjust the timers for redundancy hunting?
In the CUCM 7.0.1 Release Notes ... search for restore.
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
'Service Parameters --> Auto Answer Timer

10. Name 2 commands to verify RSVP functionality.
SIP Dial Rules
Sh ip rsvp reservation||sh sccp connections
#voice service voip| #no supplementary-service h225-notify cid-update
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False

11. How do you prevent toll fraud on CUCM?
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
(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
Master/Slave relationship. CUCM controls it.

12. How do you enable AAR system wide?
Put them in a route list.
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
CUCM Service Parameters --> Automated Alternate Routing Enable --> True
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.

13. What are the basic SCCP Commands fro telephony-service in CUCME?
Bandwidth
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
#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
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group

14. How do you block an external call from being transferred back out to the pstn by an internal user?
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
Service Parameter --> Block OffNet To OffNet Transfer --> True
Bandwidth
#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

15. How do you set up redundancy on outbound dial-peers on an H323 gateway?
voice register pool|and|voice register dn
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
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)

16. On the RDP What is the Rerouting CSS used for?
Put them in a route list.
Debug isdn q931
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
Single Number Reach (Mobile Connect)

17. What CUCM services should you activate?
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.
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
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.

18. 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
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.
(config)#voice register dialplan
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)

19. How do you enable AAR?
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 PARAMETER> Automated Alternate Routing Enable > True
(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
SIP Dial Rules

20. What are two caveats to using the ccm-manager config server</ip> command?
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.

'Use before the ... so XXXX
Ccm-manager music-on-hold

21. When setting up SIP URI where do you configure the CUCM's domain name?'
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name
Apply voice-class codec
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage

22. What are the commands to configure a SIP phone in CUCME?
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
sh ephone reg|and|debug voip dialpeer
Put them in a route list.
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

23. How do you configure CUCM redundancy on an H323 gateway?
(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
#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)#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
(config)#voice register dialplan

24. 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
It's best to strip digits at the voice port.
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
Dtmf-relay h245-alpha

25. How can you tell the difference between Proxy Line Mode and Shared Line Mode by just looking at the phone?
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit

Proxy Line Mode has multiple icons on the phone.|Shared Line Mode has only one.
Call forwarding between voip to voip (when CUBE is in play)

26. Where do you use VIA zone?
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
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
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
#voice service voip| #no supplementary-service h225-notify cid-update

27. How do you get around relying on DNS for your CUCMs?
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
#voice service voip| #no supplementary-service h225-notify cid-update
Ccm-manager music-on-hold
'Service Parameters --> Auto Answer Timer

28. How do you configure SRST?
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
(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
#voice service voip| #no supplementary-service h225-notify cid-update
Call-manager-fallback or telephony-service mode SRST

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

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30. On the RDP What is the CSS used for?
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.

Mobile Voice Access
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

31. How can you confirm the MGCP GW is registered to CUCM - in IOS?
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.
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
Sh ccm-manager

32. How do you allow H323 calls to be preserved should the primary H323 GW fail?
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Service Parameter --> Block OffNet To OffNet Transfer --> True
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.

33. How do you ensure no inter-digit timeout fro SIP phones within CUCM?
...
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.
Put them in a route list.
SIP Dial Rules

34. 'If you're not getting a DHCP address from CUCM what then?
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
voice register pool|and|voice register dn
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable

35. Is the order of the MRGs in an MRGL significant?
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
(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
Configure it on the route group through the route list - then it will be local to the route list.
Master/Slave relationship. CUCM controls it.

36. When a CUCM device dials a number - what happens?
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 .)
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
...
IP Voice Media Streaming App

37. What are the commands to configure a T1/E1 PRI?
(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
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
#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
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False

38. On an MGCP GW - if you select Top Down under Channel Selection Order - What does that mean?
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
Top Down means that channel 1 will be the first channel used to place outgoing calls.
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable

39. Where can you assign the AAR Group?
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
Bandwidth
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.

40. How do you configure a gateway to register with gatekeeper?
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
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
#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
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

41. How do you verify that NTP is working on the CUCM server?
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
At the CLI: utils ntp status
Service Parameters --> Mobile Voice Access Number

42. How do you change modes in voice register global?
Show ccm-manager
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)
CUCM - Partitions and Calling Search Spaces||CME - COR Lists

43. What are the steps to configure Single Number Reach and Mobile Voice Access?
No POTS dial-peer or no direct-inward-dial on a pots dial-peer

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
It's best to strip digits at the voice port.

44. How do you prevent toll fraud on CME?
(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
Configure it on the route group through the route list - then it will be local to the route list.
It's best to strip digits at the voice port.
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 command is needed on a gateway for it to invoke the DSP to convert multicast MOH stream to TDM?
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.
Ccm-manager music-on-hold
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
...

46. What are the commands to configure SRST in fallback?
On CUCM it's identical to adding an H323 GW.
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
Mobile Connect

47. What commands are needed to configure the voice register pool in CME?
It's best to strip digits at the voice port.
#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
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
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs

48. What is Mobile Voice Access?
Assign SIP Dial Rules
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
Reroute when there is a WAN Outage.
'Use before the ... so XXXX

49. When can you not use a Standard Local Route Group?
When configuring TEHO.
1 ... this is not optional!
Reroute when here is WAN congestion.
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files

50. 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?
#after-hours block pattern
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).