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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 is Mobile Voice Access?
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
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 .)
CUCM - Partitions and Calling Search Spaces||CME - COR Lists

2. What types of digit manipulation can you perform at the route pattern?
#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
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!

3. How do you configure DHCP in IOS?
(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
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
It's best to strip digits at the voice port.
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.

4. How do you set the inter-digit timeout for SIP phones in CME?
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
(config)#voice register dialplan
Bottom up - to prevent glare.
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 .)

5. How do you block an external call from being transferred back out to the pstn by an internal user?
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
When configuring TEHO.
Service Parameter --> Block OffNet To OffNet Transfer --> True
Sh ip rsvp reservation||sh sccp connections

6. When a device is roaming to a different site How does it get the Roaming Sensitive Settings from the Device Pool?
When configuring TEHO.
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow

7. 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 is truly unsurpassed. I have opened up a wealth of opportunities for myself and my family and
When they are explicitly matched in a destination-pattern in a dial-peer.
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
...
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.

8. What are the 3 mandatory commands within call-manager-fallback?
Max-dn|max-ephone|ip source-address
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit
TRUE
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.

9. How do you setup AutoRegistration in CUCM?
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
Top Down means that channel 1 will be the first channel used to place outgoing calls.
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
The Called/Calling Transformations are superceded.

10. On an H323 GW - how do you adjust the timers for redundancy hunting?
Debug ephone moh
Max-dn|max-ephone|ip source-address
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
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3

11. How do you configure AAR?
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
To enable two-stage dialing.
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
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.

12. How do you see multicast packets being sent?
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)
Debug ephone moh
The Called/Calling Transformations are superceded.
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.

13. What is a best practice for digit manipulation - in regards to H323 GWs?
(config)#voice register dialplan
Show ccm-manager
SIP Dial Rules
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.

14. What's the difference between AAR and SRST?
(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
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.
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage

15. Where can you assign the AAR Group?
'Service Parameters --> Auto Answer Timer
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
Outbound dial-peers
TRUE

16. How do you enable Extension Mobility for a device in CME?
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
Apply voice-class codec
TRUE
Assign a logout-profile to the ephone.

17. What does an H323 GW require that MGCP GWs do not?
Dial-peers
Phone number followed by domain name.|i.e. 3006@ipxcme.com
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name

18. When configuring a Gatekeep-controlled trunk - what do you do with the Wait for Far End H.245 TCS option?
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
Single Number Reach (Mobile Connect)
CUCM Service Parameters --> Call Park Reversion Timer
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

19. What does the Transfer On-hook Enabled Service Parameter do?
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)
It's best to strip digits at the voice port.
In CUCM - configure CFUR to point to it's E164 number.
Allows you to transfer by only pressing the Transfer button once.

20. What are the commands to ensure an H323 GW always uses the Sub as primary and Pub as a backup?
To enable two-stage dialing.
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
#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
Auto Call Pickup Enabled

21. What are the commands to configure an H323 GW?
#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
Reroute when here is WAN congestion.
Top Down means that channel 1 will be the first channel used to place outgoing calls.
Phone number followed by domain name.|i.e. 3006@ipxcme.com

22. What terminology translates to SRST?
'Service Parameters --> Auto Answer Timer
Reroute when there is a WAN Outage.
Dial-peers
When they are explicitly matched in a destination-pattern in a dial-peer.

23. What are the base telephony-service commands for CME?
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
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files

24. How do you prevent H323 caller-id updates to CUCM
At the CLI: utils ntp status
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
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

25. How do you ensure no inter-digit timeout fro SIP phones within CUCM?
#test voice translation rule 1 <input to test>
(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
Higher
SIP Dial Rules

26. When do you do digit manipulation at the route pattern as opposed to the route list?
When configuring TEHO.
When multiple sites use the same route pattern - do your digit manipulation on a route list.
Single Number Reach (Mobile Connect)
CUCM Service Parameters --> Automated Alternate Routing Enable --> True

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

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28. 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.
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.
Service Parameter --> Block OffNet To OffNet Transfer --> True
(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

29. Describe the relationship between route patterns and end devices.
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
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
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.
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323

30. 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
...
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
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

31. When you make a call and it results in a secondary dial-tone - What is this a symptom of?
(config)#sh cdp neigh detail
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
At the CLI: utils ntp status
No POTS dial-peer or no direct-inward-dial on a pots dial-peer

32. How do you configure CUBE?

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33. What should you configure before entering auto qos?
Via the voice hunt-group parallel command
Bandwidth
Precede the # with a > ... so 9011*>#
Apply voice-class codec

34. How do you configure phone ports on an ESW?
Higher
Reroute when here is WAN congestion.
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
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)

35. How do you test a Voice Translation Rule?
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
#test voice translation rule 1 <input to test>
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.

36. What are the commands to manually configure an MGCP gateway?
Call forwarding between voip to voip (when CUBE is in play)
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
#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
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow

37. How do you ensure that G.711 only is used?
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable
Master/Slave relationship. CUCM controls it.
Matches any length dialed number and truncates it to 4 digits.

38. In Gatekeeper CAC how do you restrict a specific endpoint?
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
(config)#voice register dialplan
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones

39. How do you allow H323 calls to be preserved should the primary H323 GW fail?
IP Voice Media Streaming App
#test voice translation rule 1 <input to test>
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
SIP Dial Rules

40. How do you create a trunk on the switch side?
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
Higher
Allows you to transfer by only pressing the Transfer button once.

41. When it comes to H323 gateways - what should you always change - unless explicitly told not to?
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
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
sh ephone reg|and|debug voip dialpeer

42. Where do you use VIA zone?
Apply it to the ephone.
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)
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
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

43. How do you configure class of service (CoS) in CUCM? CME?
Put them in 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.
Mobile Voice Access
CUCM - Partitions and Calling Search Spaces||CME - COR Lists

44. On the RDP What is the Rerouting CSS used for?
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
Single Number Reach (Mobile Connect)
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit

45. How do you change modes in voice register global?
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
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
#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

46. If you're using Called/Calling Party Transformations at the Route Pattern - what happens if you do Digit manipulation at the route list?
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
The Called/Calling Transformations are superceded.
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
Show ccm-manager

47. How do you enable AAR system wide?
Max-dn|max-ephone|ip source-address
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
CUCM Service Parameters --> Automated Alternate Routing Enable --> True
CUCM OS Administration Settings --> NTP Servers

48. If the PSTN is presenting on channel 1 - should you configure CUCM to search 'top down' or 'bottom up'?
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.
Bottom up - to prevent glare.
To enable two-stage dialing.

49. What dtmf-relay type do you use for an H323 GW?
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
Mobile Connect
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
Dtmf-relay h245-alpha

50. What's the best way to perform digit manipulation on a route group?
Configure it on the route group through the route list - then it will be local to the route list.
Dial-peers
Precede the # with a > ... so 9011*>#
Dtmf-relay h245-alpha

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