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. When do you do digit manipulation at the route pattern as opposed to the route list?
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
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.
Automatically configures the MGCP GW for you.

2. Two useful troubleshooting commands for CUCME?
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
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
Sh ccm-manager
sh ephone reg|and|debug voip dialpeer

3. What CM Service needs to be start in Serviceability for MOH to work?
Put them in a route list.
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
The name configuration field in ephone-dn and voice register dn
IP Voice Media Streaming App

4. How do you place SCCP and SIP phones into a single huntgroup?
CUCM Service Parameters --> Call Park Reversion Timer
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
Show ccm-manager
Via the voice hunt-group parallel command

5. What does ccm-manager config server [IP]</ip> do?
Apply voice-class codec
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
Automatically configures the MGCP GW for you.

6. How do you setup AutoRegistration in CUCM?
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
Outbound dial-peers
To enable two-stage dialing.
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP

7. How much bandwidth does a G.729 call including layer 3 require?
At the CLI: utils ntp status
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
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.
24kb/s

8. What's the difference between AAR and 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
CUCM Service Parameters --> Automated Alternate Routing Enable --> True
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.

9. How do you enable AAR?
Auto Call Pickup Enabled
SERVICE PARAMETER> Automated Alternate Routing Enable > True
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
When multiple sites use the same route pattern - do your digit manipulation on a route list.

10. What would force you to use telephony-service to configure SRST?
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
Via the voice hunt-group parallel command
Master/Slave relationship. CUCM controls it.
Assign a logout-profile to the ephone.

11. What are the commands to set up the PRI?

12. How do you configure AAR?
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
Dtmf-relay h245-alpha
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group

13. How is NTP sych setup in CUCM?
voice register pool|and|voice register dn
Configure it on the route group through the route list - then it will be local to the route list.
Higher
CUCM OS Administration Settings --> NTP Servers

14. How do you prevent toll fraud on CME?
SIP Dial Rules
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
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
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 ....

15. What's the best way to do digit manipulation on an IOS gateway?
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
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 translation-profile|and|voice translation-rule

16. How do you configure a gateway to register with gatekeeper?
The name configuration field in ephone-dn and voice register dn
Max-dn|max-ephone|ip source-address
Apply voice-class codec
#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

17. When it comes to H323 gateways - what should you always change - unless explicitly told not to?
Call-manager-fallback or telephony-service mode SRST
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
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

18. How do you enable Extension Mobility for a device in CME?
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
Assign a logout-profile to the ephone.
Call Simulator. You can use to validate path from router to the PSTN.
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 ....

19. What's the best way to perform digit manipulation on a route group?
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit
Configure it on the route group through the route list - then it will be local to the route list.
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
Assign SIP Dial Rules

20. How do you configure phone ports on a 3750?
#after-hours block pattern
Apply voice-class codec
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
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.

21. How do you convert a full PRI 9config'd by ccm-manager config server) back to a Fractional PRI?
Master/Slave relationship. CUCM controls it.

CUCM Service Parameters --> Call Park Reversion Timer
Bottom up - to prevent glare.

22. When setting up SIP URI where do you configure the CUCM's domain name?'
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.
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'
The Called/Calling Transformations are superceded.

23. Calls coming from CUCM to PSTN need what?
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
Outbound dial-peers
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones

24. How do you set the inter-digit timeout for SIP phones in CME?
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
(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
Reroute when here is WAN congestion.
(config)#voice register dialplan

25. On the RDP What is the CSS used for?
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
Mobile Voice Access
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

26. What commands are needed to configure the voice register pool in CME?
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
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
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
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)

27. 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?
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.
#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
On CUCM it's identical to adding an H323 GW.
'Service Parameters --> Auto Answer Timer

28. What are the commands to configure NTP in IOS?
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Proxy Line Mode has multiple icons on the phone.|Shared Line Mode has only one.
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify

29. How do you configure class of service (CoS) in CUCM? CME?
Dtmf-relay h245-alpha
Reroute when here is WAN congestion.
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
Auto Call Pickup Enabled

30. How do you configure CUBE?

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

32. How can you confirm the MGCP GW is registered to CUCM - in IOS?
#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
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
Sh ccm-manager

33. 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
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
...
Bottom up - to prevent glare.
Allows you to transfer by only pressing the Transfer button once.

34. Name 4 useful show commands for active calls.
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
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
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary

35. What is the Service Parameter to allow the phone that is picking ip to auto answer?
#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
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
Auto Call Pickup Enabled

36. What are the commands to configure SRST in fallback?
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
Call forwarding between voip to voip (when CUBE is in play)

37. On an MGCP GW - how could you see the primary and backup CUCM servers?
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
Show ccm-manager
When configuring TEHO.
sh ephone reg|and|debug voip dialpeer

38. What does an H323 GW require that MGCP GWs do not?
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 (if no response within 3 seconds continue dial-peer hunting)
Dial-peers
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)

39. Is the order of the MRGs in an MRGL significant?
voice register pool|and|voice register dn
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
SIP Dial Rules
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup

40. On an H323 GW - how do you adjust the timers for redundancy hunting?
Outbound dial-peers
IP Voice Media Streaming App
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
TRUE

41. What are the commands to create the L3 routing interface for VLANS (SVI)?
sh ephone reg|and|debug voip dialpeer
The name configuration field in ephone-dn and voice register dn
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
...

42. How do you see multicast packets being sent?
(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
'Use before the ... so XXXX
Precede the # with a > ... so 9011*>#
Debug ephone moh

43. On an MGCP GW - if you select Top Down under Channel Selection Order - What does that mean?
Top Down means that channel 1 will be the first channel used to place outgoing calls.
Apply voice-class codec
Master/Slave relationship. CUCM controls it.
Call forwarding between voip to voip (when CUBE is in play)

44. What command is needed on a gateway for it to invoke the DSP to convert multicast MOH stream to TDM?
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
SIP Route Pattern over a SIP Trunk.
Ccm-manager music-on-hold
Matches any length dialed number and truncates it to 4 digits.

45. Where do you use VIA zone?
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
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
It's best to strip digits at the voice port.
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.

46. What are the steps to configure Single Number Reach and Mobile Voice Access?
Device Pool Locations
Mobile Voice Access

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

47. Which takes precedence Device Locations or Device Pool Locations?
Phone number followed by domain name.|i.e. 3006@ipxcme.com
Device Pool Locations
(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.

48. Name 2 commands to verify RSVP functionality.
Sh ip rsvp reservation||sh sccp connections
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
(config)#sh cdp neigh detail
#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

49. An MGCP gateway serving as an SRST router requires what?
Dtmf-relay h245-alpha
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
Redundant dial plan. One on CUCM and one on the routers via dial-peers.

50. When you make a call and it results in a secondary dial-tone - What is this a symptom of?
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie
SERVICE PARAMETER> Automated Alternate Routing Enable > True
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
#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