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CCIE Voice Test

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Answer 50 questions in 15 minutes.
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1. How do you configure a gateway to register with gatekeeper?
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
#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
#after-hours block pattern
...

2. Aside from the Media Resources --> Mobile Voice Access where else do you need to specify the the Mobile Voice Access DN?
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
Service Parameters --> Mobile Voice Access Number
#after-hours block pattern

3. What CUCM services should you activate?
Debug isdn q931
'Use before the ... so XXXX
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
Phone number followed by domain name.|i.e. 3006@ipxcme.com

4. When do you do digit manipulation at the route pattern as opposed to the route list?
Bottom up - to prevent glare.
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
When multiple sites use the same route pattern - do your digit manipulation on a route list.
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

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

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6. What are the commands to ensure an H323 GW always uses the Sub as primary and Pub as a backup?
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
(config)#voice register dialplan
Sends the Calling Name.
#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

7. How do you ensure no inter-digit timeout fro SIP phones within CUCM?
24kb/s
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
Via the voice hunt-group parallel command
SIP Dial Rules

8. Name 4 useful show commands for active calls.

Sends the Calling Name.
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
#test voice translation rule 1 <input to test>

9. How do you enable Extension Mobility for a device in CME?
Precede the # with a > ... so 9011*>#
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
Service Parameters --> Mobile Voice Access Number
Assign a logout-profile to the ephone.

10. '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
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
Call Simulator. You can use to validate path from router to the PSTN.
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name
...

11. How do you verify where MOH is being served up from?

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12. How do you place SCCP and SIP phones into a single huntgroup?
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
Precede the # with a > ... so 9011*>#
Via the voice hunt-group parallel command
Ccm-manager music-on-hold

13. In CUCME what SIP config command is equivalent to ephone and ephone-dn?
The Called/Calling Transformations are superceded.
Ccm-manager music-on-hold
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 register pool|and|voice register dn

14. On an MGCP GW - if you select Top Down under Channel Selection Order - What does that mean?
Outbound dial-peers
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.
Proxy Line Mode has multiple icons on the phone.|Shared Line Mode has only one.
Top Down means that channel 1 will be the first channel used to place outgoing calls.

15. How do you convert a full PRI 9config'd by ccm-manager config server) back to a Fractional PRI?
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
Single Number Reach (Mobile Connect)

(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

16. 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
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit
Outbound dial-peers
Assign SIP Dial Rules

17. What are the commands to configure a MGCP Gateway? (router)
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
Top Down means that channel 1 will be the first channel used to place outgoing calls.
'Service Parameters --> Auto Answer Timer
#after-hours block pattern

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

19. How do you prevent toll fraud on CME?
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 ....
Master/Slave relationship. CUCM controls it.
CUCM OS Administration Settings --> NTP Servers
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 .)

20. How do you configure an MGCP GW? (router side)
(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
#test voice translation rule 1 <input to test>
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
When configuring TEHO.

21. When it comes to H323 gateways - what should you always change - unless explicitly told not to?
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
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False

22. What does the Transfer On-hook Enabled Service Parameter do?
Automatically configures the MGCP GW for you.
Service Parameter --> Block OffNet To OffNet Transfer --> True
Allows you to transfer by only pressing the Transfer button once.
Higher

23. What is Phone NTP Reference used for?
Reroute when here is WAN congestion.
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
To notify SIP Phones of NTP
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.

24. What dtmf-relay type do you use for an H323 GW?
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
Dtmf-relay h245-alpha
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.

25. When are digits stripped in a gateway?
When they are explicitly matched in a destination-pattern in a dial-peer.
Service Parameters --> Mobile Voice Access Number
Higher
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323

26. What should you configure before entering auto qos?
Bandwidth
Assign SIP Dial Rules
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
Master/Slave relationship. CUCM controls it.

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

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28. How do you set the inter-digit timeout for SIP phones in CME?
(config)#voice register dialplan
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
Max-dn|max-ephone|ip source-address
Service Parameters --> Mobile Voice Access Number

29. How do you create a trunk on the router side?
Debug ephone moh
24kb/s
#test voice translation rule 1 <input to test>
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

30. 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?
At the CLI: utils ntp status
Phone number followed by domain name.|i.e. 3006@ipxcme.com
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
...

31. If you're using Called/Calling Party Transformations at the Route Pattern - what happens if you do Digit manipulation at the route list?
(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
The Called/Calling Transformations are superceded.
8kb/s
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

32. What is call-forward pattern used for?
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
Call forwarding between voip to voip (when CUBE is in play)
Apply voice-class codec
+ [CC 1-3 digits] [National Number max 15 minus CC digits]

33. If you need terminate and reoriginate all calls through the CUBE - what do you need to do.
(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
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
Sh ccm-manager

34. How do you setup AutoRegistration in CUCM?
When they are explicitly matched in a destination-pattern in a dial-peer.
The name configuration field in ephone-dn and voice register dn
...
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP

35. What terminology translates to AAR?

SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Reroute when here is WAN congestion.
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!

36. Need to Know||Anytime you have an external call - it needs to match on a route pattern.
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
When configuring TEHO.
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!

37. What CM Service needs to be start in Serviceability for MOH to work?
CUCM Service Parameters --> Call Park Reversion Timer
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
IP Voice Media Streaming App
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323

38. How do you block an external call from being transferred back out to the pstn by an internal user?

#test voice translation rule 1 <input to test>
Service Parameter --> Block OffNet To OffNet Transfer --> True
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage

39. With the gw-priority command - does higher or lower priority take precedence?
Configure it on the route group through the route list - then it will be local to the route list.
Higher
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
CUCM Service Parameters --> Call Park Reversion Timer

40. What are the commands to configure an H323 GW?
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

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

41. Which takes precedence Device Locations or Device Pool Locations?
'Service Parameters --> Auto Answer Timer
Device Pool Locations
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

42. What are two caveats to using the ccm-manager config server</ip> command?
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3

CUCM - Partitions and Calling Search Spaces||CME - COR Lists
SERVICE PARAMETER> Automated Alternate Routing Enable > True

43. Where do you use VIA zone?
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
Sends the Calling Name.
'Service Parameters --> Auto Answer Timer
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

44. What command is needed on a gateway for it to invoke the DSP to convert multicast MOH stream to TDM?
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
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
+ [CC 1-3 digits] [National Number max 15 minus CC digits]

45. How much bandwidth does a G.729 call including layer 3 require?
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
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
24kb/s
Max-dn|max-ephone|ip source-address

46. How do you use the # as a string terminator within a SIP Dial Rule?
Precede the # with a > ... so 9011*>#

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 ....
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.

47. When can you not use a Standard Local Route Group?
...
Ccm-manager music-on-hold
When configuring TEHO.
Debug isdn q931

48. What does an H323 GW require that MGCP GWs do not?
Dial-peers
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
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable

49. Where can you assign the AAR Group?
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.
When multiple sites use the same route pattern - do your digit manipulation on a route list.
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 .)

50. An MGCP gateway serving as an SRST router requires what?
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
Single Number Reach (Mobile Connect)
Apply voice-class codec
'Service Parameters --> Auto Answer Timer

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CCIE Voice Test

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