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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. What are the commands to set up the PRI?

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2. What are the commands to configure SIP phones in CME?
Debug isdn q931
Put them in a route list.
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 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

3. What does an H323 GW require that MGCP GWs do not?
Dial-peers
CUCM Service Parameters --> 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
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.

4. Describe the relationship between route patterns and end devices.
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)
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.
When configuring TEHO.
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True

5. 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.
#voice service voip| #no supplementary-service h225-notify cid-update
TRUE
Redundant dial plan. One on CUCM and one on the routers via dial-peers.

6. What are the commands to configure a T1/E1 PRI?
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
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
Reroute when there is a WAN Outage.
(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

7. How do you ensure an H323 GW always uses the Sub as primary and Pub as a backup?
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.
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
#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

8. 'If you want to make changes to any softkeys where do you do it?
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
Call-manager-fallback or telephony-service mode SRST
Debug ephone moh
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.

9. When do you do digit manipulation at the route pattern as opposed to the route list?
It's best to strip digits at the voice port.
When multiple sites use the same route pattern - do your digit manipulation on a route list.
Max-dn|max-ephone|ip source-address
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323

10. How do you see multicast packets being sent?

Mobile Connect
Apply it to the ephone.
Debug ephone moh

11. How do you configure CUCM redundancy on an H323 gateway?
Outbound dial-peers
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
#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

12. What do you need to do to activate the CME GUI?
Service Parameters --> Mobile Voice Access Number
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
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
Bottom up - to prevent glare.

13. What is the bit rate for a G.729 call excluding layer 2?
8kb/s
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
...

14. What are the commands to configure a SIP phone in CUCME?
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
When configuring TEHO.
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
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.

15. On the RDP What is the Rerouting CSS used for?
voice register pool|and|voice register dn
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
Device Pool Locations
Single Number Reach (Mobile Connect)

16. What are the 3 mandatory commands within call-manager-fallback?
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 ....
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
Max-dn|max-ephone|ip source-address
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup

17. What is the full E164 format?
In CUCM - configure CFUR to point to it's E164 number.
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
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
(config)#sh cdp neigh detail

18. When configuring a Gatekeep-controlled trunk - what do you do with the Wait for Far End H.245 TCS option?
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
The Called/Calling Transformations are superceded.
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

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

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20. How do do configure TEHO?
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
#after-hours block pattern
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
Service Parameter --> Block OffNet To OffNet Transfer --> True

21. What are the commands to create the L3 routing interface for VLANS (SVI)?
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
#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
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
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

22. How do you configure SRST?
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
Call-manager-fallback or telephony-service mode SRST
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'
Apply voice-class codec

23. Calls coming from CUCM to PSTN need what?
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.
Outbound dial-peers

24. What are the commands to configure NTP in IOS?
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
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
#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
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify

25. How do you test a Voice Translation Rule?
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'
#test voice translation rule 1 <input to test>
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 ....
Top Down means that channel 1 will be the first channel used to place outgoing calls.

26. When setting up SIP URI where do you configure the CUCM's domain name?'
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
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name
SIP Dial Rules
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow

27. What are the basic SCCP Commands fro telephony-service in CUCME?
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
Re-enter the mgcp bind control and mgcp bind media commands.
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable

28. How do you allow H323 calls to be preserved should the primary H323 GW fail?
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
Dtmf-relay h245-alpha
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Master/Slave relationship. CUCM controls it.

29. Does CUCM support RSVP natively?
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
#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
In the CUCM 7.0.1 Release Notes ... search for restore.
CUCM Service Parameters --> Call Park Reversion Timer

30. What are the commands to configure a MGCP Gateway? (router)
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
...
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

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

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32. What are the commands to configure SRST in fallback?
Outbound dial-peers
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
CUCM OS Administration Settings --> NTP Servers

33. What's the difference between AAR and SRST?
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
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
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.

34. Privacy is enabled system-wide in CUCM by default. (T or F)
Dtmf-relay h245-alpha
In CUCM - configure CFUR to point to it's E164 number.
Allows you to transfer by only pressing the Transfer button once.
TRUE

35. In CME Where is the Calling Name derived from?
Call-manager-fallback or telephony-service mode SRST
The name configuration field in ephone-dn and voice register dn
voice translation-profile|and|voice translation-rule
8kb/s

36. On an MGCP GW - if you select Top Down under Channel Selection Order - What does that mean?
voice register pool|and|voice register dn
Top Down means that channel 1 will be the first channel used to place outgoing calls.
Service Parameter --> Block OffNet To OffNet Transfer --> True
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.

37. How do you block calls under call-manager-fallback?
#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> Automated Alternate Routing Enable > True
Service Parameters --> Mobile Voice Access Number
#after-hours block pattern

38. What CM Service needs to be start in Serviceability for MOH to work?
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
Auto Call Pickup Enabled
Put them in a route list.
IP Voice Media Streaming App

39. What's the best way to perform digit manipulation on a route group?
Assign a logout-profile to the ephone.
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
24kb/s
Configure it on the route group through the route list - then it will be local to the route list.

40. What are the commands to manually configure an MGCP gateway?
#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
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called 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
Top Down means that channel 1 will be the first channel used to place outgoing calls.

41. What dtmf-relay type do you use for an H323 GW?
#voice service voip| #no supplementary-service h225-notify cid-update
SIP Route Pattern over a SIP Trunk.
Dtmf-relay h245-alpha
#after-hours block pattern

42. How do you see the details of calls coming in and out of the PRI?
Debug isdn q931
Phone number followed by domain name.|i.e. 3006@ipxcme.com
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
(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

43. Describe how you configure SIP URI functionality.
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.

When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
#after-hours block pattern

44. When it comes to H323 gateways - what should you always change - unless explicitly told not to?
Sh ccm-manager
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
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
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

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

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46. 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?
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
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
voice register pool|and|voice register dn
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!

47. How is NTP sych setup in CUCM?
CUCM Service Parameters --> Automated Alternate Routing Enable --> True
8kb/s
CUCM OS Administration Settings --> NTP Servers
When they are explicitly matched in a destination-pattern in a dial-peer.

48. What types of digit manipulation can you perform at the route pattern?
Bottom up - to prevent glare.
Debug isdn q931
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!

49. What's the best way to do digit manipulation on an IOS gateway?
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
voice translation-profile|and|voice translation-rule
Sh ip rsvp reservation||sh sccp connections
Apply it to the ephone.

50. How do you configure class of service (CoS) in CUCM? CME?
Automatically configures the MGCP GW for you.
Dial-peers
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name

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CCIE Voice Test

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