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 does the Transfer On-hook Enabled Service Parameter do?
Top Down means that channel 1 will be the first channel used to place outgoing calls.
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 .)
Dtmf-relay h245-alpha
Allows you to transfer by only pressing the Transfer button once.

2. When do you do digit manipulation at the route pattern as opposed to the route list?
#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
Apply voice-class codec
Mobile Connect
When multiple sites use the same route pattern - do your digit manipulation on a route list.

3. What is the full E164 format?
#voice service voip| #no supplementary-service h225-notify cid-update
Dial-peers
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
The Called/Calling Transformations are superceded.

4. How do you configure a SIP Trunk? (router side)
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
(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
Sends the Calling Name.

5. On the RDP What is the Rerouting CSS used for?
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
Single Number Reach (Mobile Connect)
8kb/s
'Service Parameters --> Auto Answer Timer

6. How is NTP sych setup in CUCM?
CUCM OS Administration Settings --> NTP Servers
It's best to strip digits at the voice port.
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM

7. 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.
Device Pool Locations
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False

8. What kind of relationship does an MGCP gateway have with CUCM?
Master/Slave relationship. CUCM controls it.
...
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
No POTS dial-peer or no direct-inward-dial on a pots dial-peer

9. What are the commands to configure SRST in fallback?
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
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
...

10. How do you set the inter-digit timeout for SIP phones in CME?
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
#after-hours block pattern
(config)#voice register dialplan
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.

11. What does KPML do?
1 ... this is not optional!
Assign SIP Dial Rules
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.

12. How do you prioritize route groups?
Phone number followed by domain name.|i.e. 3006@ipxcme.com
#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
Put them in a route list.
Top Down means that channel 1 will be the first channel used to place outgoing calls.

13. How do do configure TEHO?
1 ... this is not optional!
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
Sends the Calling 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

14. How can you tell the difference between Proxy Line Mode and Shared Line Mode by just looking at the phone?
'Service Parameters --> Auto Answer Timer
Proxy Line Mode has multiple icons on the phone.|Shared Line Mode has only one.
Sends the Calling Name.
Master/Slave relationship. CUCM controls it.

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

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16. How do you configure phone ports on an ESW?
(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
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
(config)#sh cdp neigh detail
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup

17. What are the commands to ensure an H323 GW always uses the Sub as primary and Pub as a backup?
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
#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
Dtmf-relay h245-alpha
Reroute when here is WAN congestion.

18. How do you verify that NTP is working on the CUCM server?
...
At the CLI: utils ntp status
(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
Re-enter the mgcp bind control and mgcp bind media commands.

19. What is CSIM?
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
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.
Call Simulator. You can use to validate path from router to the PSTN.
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.

20. How do you configure DHCP in IOS?
Service Parameters --> Mobile Voice Access Number
(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
It's best to strip digits at the voice port.
The name configuration field in ephone-dn and voice register dn

21. How do you allow H323 calls to be preserved should the primary H323 GW fail?
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>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Mobile Voice Access
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.

22. What are the steps to configure Single Number Reach and Mobile Voice Access?
Ccm-manager music-on-hold

SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Dial-peers

23. What types of digit manipulation can you perform at the route pattern?

The Called/Calling Transformations are superceded.
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!

24. What's the difference between AAR and SRST?
In CUCM - configure CFUR to point to it's E164 number.
Reroute when there is a WAN Outage.
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
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage

25. What are the commands to configure an H323 GW?
Call Simulator. You can use to validate path from router to the PSTN.
#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 service voip| #no supplementary-service h225-notify cid-update
Automatically configures the MGCP GW for you.

26. How can you confirm the MGCP GW is registered to CUCM - in IOS?
Bandwidth
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
Sh ccm-manager
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files

27. 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
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
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 .)
...

28. How do you enable AAR system wide?
Matches any length dialed number and truncates it to 4 digits.
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
Top Down means that channel 1 will be the first channel used to place outgoing calls.
CUCM Service Parameters --> Automated Alternate Routing Enable --> True

29. How do you configure a gateway to register with gatekeeper?
#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
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
8kb/s

30. In CUCME what SIP config command is equivalent to ephone and ephone-dn?
voice register pool|and|voice register dn
Allows you to transfer by only pressing the Transfer button once.
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
Apply it to the ephone.

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

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32. Maximum Wait Time for Desk Pickup?
When they are explicitly matched in a destination-pattern in a dial-peer.
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
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.

33. When using GK redundancy - what must you do to ensure both SUB and PUB use port 1720 for call-signalling.

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34. How do you disable KPML?
Assign SIP Dial Rules
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
Max-dn|max-ephone|ip source-address

35. How do you block calls under call-manager-fallback?
Via the voice hunt-group parallel command
Higher
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
#after-hours block pattern

36. With the gw-priority command - does higher or lower priority take precedence?
Higher

#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
CUCM Service Parameters --> Call Park Reversion Timer

37. How do you see the details of calls coming in and out of the PRI?
...
Matches any length dialed number and truncates it to 4 digits.
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
Debug isdn q931

38. How much bandwidth does a G.729 call including layer 3 require?
Precede the # with a > ... so 9011*>#
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
Bottom up - to prevent glare.
24kb/s

39. Describe how you configure SIP URI functionality.
#test voice translation rule 1 <input to test>
In CUCM - configure CFUR to point to it's E164 number.

Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.

40. Need to Know||Anytime you have an external call - it needs to match on a route pattern.
#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

When multiple sites use the same route pattern - do your digit manipulation on a route list.
Need to Know||Anytime you have an external call - it needs to match on a route pattern.

41. Which takes precedence Device Locations or Device Pool Locations?
To notify SIP Phones of NTP
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
Device Pool Locations
Phone number followed by domain name.|i.e. 3006@ipxcme.com

42. Is the order of the MRGs in an MRGL significant?
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
'Service Parameters --> Auto Answer Timer
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-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

43. What are the commands to configure SIP phones in CME?
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
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)

44. How do you change modes in voice register global?
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
#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
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
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST

45. How do you allow the Calling Name to be sent to the PSTN on a router?
#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)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie
1 ... this is not optional!
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

46. What is call-forward pattern used for?
Service Parameters --> Mobile Voice Access Number
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
Service Parameter --> Block OffNet To OffNet Transfer --> True
Call forwarding between voip to voip (when CUBE is in play)

47. What is the bit rate for a G.729 call excluding layer 2?
8kb/s
To notify SIP Phones of NTP
Assign a logout-profile to the ephone.
CUCM Service Parameters --> Call Park Reversion Timer

48. What are the commands to configure a MGCP Gateway? (router)
#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 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
Phone number followed by domain name.|i.e. 3006@ipxcme.com
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

49. How do you ensure that G.711 only is used?
Assign a logout-profile to the ephone.
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable

50. When a device is roaming to a different site How does it get the Roaming Sensitive Settings from the Device Pool?
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify

8kb/s
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.