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CCIE Voice Test

Instructions:

Answer 50 questions in 15 minutes.
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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. What should you configure before entering auto qos?
Call Simulator. You can use to validate path from router to the PSTN.
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
1 ... this is not optional!
Bandwidth

2. When configuring a Gatekeep-controlled trunk - what do you do with the Wait for Far End H.245 TCS option?
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
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
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
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.

3. Maximum Wait Time for Desk Pickup?
#test voice translation rule 1 <input to test>
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
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)
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup

4. When do you do digit manipulation at the route pattern as opposed to the route list?
When multiple sites use the same route pattern - do your digit manipulation on a route list.
Master/Slave relationship. CUCM controls it.
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
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

5. How do you set the Call Park Reversion Timer?
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
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
Call forwarding between voip to voip (when CUBE is in play)
CUCM Service Parameters --> Call Park Reversion Timer

6. How do you setup AutoRegistration in CUCM?
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.

System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.

7. What does KPML do?
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
SERVICE PARAMETER> Automated Alternate Routing Enable > True

8. How do you configure SRST?
Call-manager-fallback or telephony-service mode SRST
Sh ccm-manager
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
Outbound dial-peers

9. How do you configure a gateway to register with gatekeeper?
#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
To enable two-stage dialing.
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
Sh ccm-manager

10. 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?
The Called/Calling Transformations are superceded.
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)
No POTS dial-peer or no direct-inward-dial on a pots dial-peer

11. What are the 3 mandatory commands within call-manager-fallback?
Automatically configures the MGCP GW for you.
Max-dn|max-ephone|ip source-address
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)

12. How do you use the # as a string terminator within a SIP Dial Rule?
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Automatically configures the MGCP GW for you.
Dtmf-relay h245-alpha
Precede the # with a > ... so 9011*>#

13. What does ccm-manager config server [IP]</ip> do?
1 ... this is not optional!
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
Automatically configures the MGCP GW for you.
Matches any length dialed number and truncates it to 4 digits.

14. Two useful troubleshooting commands for CUCME?
sh ephone reg|and|debug voip dialpeer
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
#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
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)

15. How do you get around relying on DNS for your CUCMs?
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
(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
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs

16. An MGCP gateway serving as an SRST router requires what?
Phone number followed by domain name.|i.e. 3006@ipxcme.com
Master/Slave relationship. CUCM controls it.
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs

17. How do you configure CUBE?

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18. How would you enable security on a GK?
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
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 .)
Reroute when here is WAN congestion.
Master/Slave relationship. CUCM controls it.

19. 'How do you inform a SIP phone of NTP information?
#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
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.
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
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group

20. How do you prevent toll fraud on CUCM?
#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
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
Allows you to transfer by only pressing the Transfer button once.
...

21. What are the commands to manually configure an MGCP gateway?
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
#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)#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
Bottom up - to prevent glare.

22. How is NTP sych setup in CUCM?
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name
Debug isdn q931
CUCM OS Administration Settings --> NTP Servers
In CUCM - configure CFUR to point to it's E164 number.

23. What terminology translates to SRST?
Call forwarding between voip to voip (when CUBE is in play)
Reroute when there is a WAN Outage.
(config)#sh cdp neigh detail
Service Parameters --> Mobile Voice Access Number

24. How do you maintain 4-digit dialing to phones that are running in an SRST scenario (WAN outage)?

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25. In CUCME what SIP config command is equivalent to ephone and ephone-dn?
'Service Parameters --> Auto Answer Timer
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.
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group

26. How do you allow H323 calls to be preserved should the primary H323 GW fail?
Call forwarding between voip to voip (when CUBE is in play)
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast

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

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28. What does the Transfer On-hook Enabled Service Parameter do?
Debug isdn q931
Precede the # with a > ... so 9011*>#
Allows you to transfer by only pressing the Transfer button once.
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.

29. How do you create a trunk on the router side?
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-manager-fallback or telephony-service mode SRST
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
At the CLI: utils ntp status

30. What commands are needed to configure the voice register pool in CME?
(config)#sh cdp neigh detail
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
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
Configure it on the route group through the route list - then it will be local to the route list.

31. 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
Mobile Connect
Call-manager-fallback or telephony-service mode SRST
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST

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

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33. Which takes precedence Device Locations or Device Pool Locations?
On CUCM it's identical to adding an H323 GW.
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
Device Pool Locations
#after-hours block pattern

34. On a gatekeeper trunk - how do you ensure the Sub is used as primary and Pub as backup?
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
Single Number Reach (Mobile Connect)
The name configuration field in ephone-dn and voice register dn

35. What kind of relationship does an MGCP gateway have with CUCM?
Sh ip rsvp reservation||sh sccp connections
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
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)
Master/Slave relationship. CUCM controls it.

36. Where can you assign the AAR Group?
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
To enable two-stage dialing.
Reroute when there is a WAN Outage.
When multiple sites use the same route pattern - do your digit manipulation on a route list.

37. What is a best practice for digit manipulation - in regards to H323 GWs?
Bottom up - to prevent glare.
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.

38. How do you prioritize route groups?
#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 --> Block OffNet To OffNet Transfer --> True
Put them in a 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

39. On the RDP What is the Rerouting CSS used for?
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
Single Number Reach (Mobile Connect)
Automatically configures the MGCP GW for you.
Bottom up - to prevent glare.

40. With the gw-priority command - does higher or lower priority take precedence?
Phone number followed by domain name.|i.e. 3006@ipxcme.com
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
#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
Higher

41. When are digits stripped in a gateway?
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
To notify SIP Phones of NTP
When they are explicitly matched in a destination-pattern in a dial-peer.
Device Pool Locations

42. How do you configure a SIP Trunk? (router side)
Reroute when there is a WAN Outage.
#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-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
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify

43. How do you ensure no inter-digit timeout fro SIP phones within CUCM?
(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
SIP Dial Rules
It's best to strip digits at the voice port.
#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

44. Where do you use VIA zone?
#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
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
Reroute when here is WAN congestion.
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP

45. Does CUCM support RSVP natively?
CUCM Service Parameters --> Automated Alternate Routing Enable --> True
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.

Reroute when here is WAN congestion.

46. How do you set up redundancy on outbound dial-peers on an H323 gateway?
Via the voice hunt-group parallel command
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
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
Service Parameter --> Block OffNet To OffNet Transfer --> True

47. Describe how you configure SIP URI functionality.
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.

Sends the Calling Name.
Top Down means that channel 1 will be the first channel used to place outgoing calls.

48. How can you tell the difference between Proxy Line Mode and Shared Line Mode by just looking at the phone?
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
Proxy Line Mode has multiple icons on the phone.|Shared Line Mode has only one.
Assign a logout-profile to the ephone.
On CUCM it's identical to adding an H323 GW.

49. Calls coming from CUCM to PSTN need what?
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
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 ....
Outbound dial-peers
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!

50. What are the commands to configure a T1/E1 PRI?
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
Allows you to transfer by only pressing the Transfer button once.
Mobile Connect

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CCIE Voice Test

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