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CCIE Voice Test

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Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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 ensure an H323 GW always uses the Sub as primary and Pub as a backup?
When multiple sites use the same route pattern - do your digit manipulation on a route list.
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.
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
Re-enter the mgcp bind control and mgcp bind media commands.

2. How do you configure a SIP Trunk? (router side)
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.
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)
Ccm-manager music-on-hold
(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

3. What is Phone NTP Reference used for?
#voice service voip| #no supplementary-service h225-notify cid-update
voice translation-profile|and|voice translation-rule
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
To notify SIP Phones of NTP

4. What is the bit rate for a G.729 call excluding layer 2?
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
Sh ccm-manager
8kb/s
Mobile Connect

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

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6. How do you prevent toll fraud on CME?
Reroute when here is WAN congestion.
Bottom up - to prevent glare.
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 ....
Ccm-manager music-on-hold

7. What are the base telephony-service commands for CME?
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
Precede the # with a > ... so 9011*>#
Show ccm-manager

8. How do you ensure that G.711 only is used?
voice register pool|and|voice register dn
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
To notify SIP Phones of NTP
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable

9. On the RDP What is the CSS used for?
In CUCM - configure CFUR to point to it's E164 number.
Higher
CUCM OS Administration Settings --> NTP Servers
Mobile Voice Access

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

11. Where do you use VIA zone?
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
The Called/Calling Transformations are superceded.
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
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

12. When using drop-through-option What is the max number of huntgroups?
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
1 ... this is not optional!
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.
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.

13. How is NTP sych setup in CUCM?
Dial-peers
CUCM OS Administration Settings --> NTP Servers
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
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

14. What are the commands to configure an H323 GW?
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
Device Pool Locations
#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
TRUE

15. How can you confirm the MGCP GW is registered to CUCM - in IOS?
Dial-peers
Phone number followed by domain name.|i.e. 3006@ipxcme.com
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
Sh ccm-manager

16. How do you configure AAR?
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'
Put them in a route list.
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
...

17. On the RDP What is the Rerouting CSS used for?
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
Ccm-manager music-on-hold
Via the voice hunt-group parallel command
Single Number Reach (Mobile Connect)

18. How do you place SCCP and SIP phones into a single huntgroup?
#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)#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
Precede the # with a > ... so 9011*>#
Via the voice hunt-group parallel command

19. How do you see multicast packets being sent?
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)
IP Voice Media Streaming App
Debug ephone moh
#voice service voip| #no supplementary-service h225-notify cid-update

20. When it comes to H323 gateways - what should you always change - unless explicitly told not to?
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
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

21. 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
Debug ephone moh
Higher
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.

22. How do you enable Extension Mobility for a device in CME?
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
Assign a logout-profile to the ephone.
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
Call Simulator. You can use to validate path from router to the PSTN.

23. Where is it best to manipulate digits for inbound calls?

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24. What is CSIM?
Call Simulator. You can use to validate path from router to the PSTN.
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
When multiple sites use the same route pattern - do your digit manipulation on a route list.
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

25. Calls coming from CUCM to PSTN need what?
sh ephone reg|and|debug voip dialpeer
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
Outbound dial-peers
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.

26. What should you configure before entering auto qos?
In CUCM - configure CFUR to point to it's E164 number.
Bandwidth

Call forwarding between voip to voip (when CUBE is in play)

27. What are the steps to configure Single Number Reach and Mobile Voice Access?
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
Higher

When configuring TEHO.

28. How do you setup AutoRegistration in CUCM?
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
Bottom up - to prevent glare.
Service Parameters --> Mobile Voice Access Number
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP

29. What terminology translates to AAR?
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
24kb/s
Reroute when here is WAN congestion.
Assign a logout-profile to the ephone.

30. Does CUCM support RSVP natively?
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name
(config)#sh cdp neigh detail
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup

31. Two useful troubleshooting commands for CUCME?
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.
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.
sh ephone reg|and|debug voip dialpeer
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup

32. How do you change modes in voice register global?
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
Sends the Calling Name.
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name

33. How do you configure CUCM redundancy on an H323 gateway?
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
#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
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 ....

34. If the PSTN is presenting on channel 1 - should you configure CUCM to search 'top down' or 'bottom up'?
Bottom up - to prevent glare.
When multiple sites use the same route pattern - do your digit manipulation on a route list.
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup

35. In Gatekeeper CAC how do you restrict a specific endpoint?
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
SIP Route Pattern over a SIP Trunk.
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
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1

36. How do you prevent H323 caller-id updates to CUCM
#voice service voip| #no supplementary-service h225-notify cid-update
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
To notify SIP Phones of NTP
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)

37. How would you enable security on a GK?
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
Higher
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
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow

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

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39. How do you configure an MGCP GW? (router side)
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
When multiple sites use the same route pattern - do your digit manipulation on a route list.
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
(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

40. How do you use an ephone template?
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
On CUCM it's identical to adding an H323 GW.
Apply it to the ephone.
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name

41. How do do configure TEHO?
Re-enter the mgcp bind control and mgcp bind media commands.
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
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit
Phone number followed by domain name.|i.e. 3006@ipxcme.com

42. Name 2 commands to verify RSVP functionality.
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
Sh ip rsvp reservation||sh sccp connections
Put them in a route list.
To notify SIP Phones of NTP

43. What are the commands to configure a MGCP Gateway? (router)
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
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
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.

44. What does the Transfer On-hook Enabled Service Parameter do?
Single Number Reach (Mobile Connect)
(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
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
Allows you to transfer by only pressing the Transfer button once.

45. What does ccm-manager config server [IP]</ip> do?
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
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
Automatically configures the MGCP GW for you.
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast

46. Maximum Wait Time for Desk Pickup?
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
Dial-peers

In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.

47. How do you set the inter-digit timeout for SIP phones in CME?
(config)#voice register dialplan
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
SERVICE PARAMETER> Automated Alternate Routing Enable > True
'Service Parameters --> Auto Answer Timer

48. If you need terminate and reoriginate all calls through the CUBE - what do you need to do.
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.

49. A show isdn status shows TEI_ASSIGNED. What do you do to get MULTIPLE_FRAME_ESTABLISHED?
Re-enter the mgcp bind control and mgcp bind media commands.

1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM

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

CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
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.
Dial-peers

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