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CCIE Voice Test

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
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. On an MGCP GW - how could you see the primary and backup CUCM servers?
Show ccm-manager
Ccm-manager music-on-hold
In CUCM - configure CFUR to point to it's E164 number.
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.

2. What should you configure before entering auto qos?
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
Bandwidth
(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. How do you configure phone ports on an ESW?
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
Bottom up - to prevent glare.
In CUCM - configure CFUR to point to it's E164 number.
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

4. 'If you're not getting a DHCP address from CUCM what then?
Call-manager-fallback or telephony-service mode SRST
Sh ip rsvp reservation||sh sccp connections
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
+ [CC 1-3 digits] [National Number max 15 minus CC digits]

5. Calls coming from CUCM to PSTN need what?
(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 Route Pattern over a SIP Trunk.
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
Outbound dial-peers

6. What would force you to use telephony-service to configure SRST?
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
#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
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
Master/Slave relationship. CUCM controls it.

7. What CUCM services should you activate?
SIP Route Pattern over a SIP Trunk.
Debug isdn q931
Configure it on the route group through the route list - then it will be local to the route list.
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.

8. How would you verify that DHCP is working in IOS?
At the CLI: utils ntp status
(config)#sh cdp neigh detail
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP

9. How do you configure a SIP Trunk? (router side)
Phone number followed by domain name.|i.e. 3006@ipxcme.com
(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
Sh ccm-manager
Redundant dial plan. One on CUCM and one on the routers via dial-peers.

10. What does ccm-manager config server [IP]</ip> do?
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
Automatically configures the MGCP GW for you.
On CUCM it's identical to adding an H323 GW.
Via the voice hunt-group parallel command

11. 'If you want to make changes to any softkeys where do you do it?
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.
Device Pool Locations
Matches any length dialed number and truncates it to 4 digits.
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323

12. What are the basic ephone-dn and ephone commands?
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
The Called/Calling Transformations are superceded.
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
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)

13. What must you do for a BACD script to work on a CME router?
Reroute when here is WAN congestion.
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
Debug isdn q931

14. What do you need to do to activate the CME GUI?
Bottom up - to prevent glare.
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
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
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files

15. What are the basic SCCP Commands fro telephony-service in CUCME?
1 ... this is not optional!
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
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

16. With the gw-priority command - does higher or lower priority take precedence?
#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
Re-enter the mgcp bind control and mgcp bind media commands.
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
Higher

17. What does Display-IE do?
Sends the Calling Name.
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
Outbound dial-peers

18. What are the commands to configure SIP phones in CME?
When they are explicitly matched in a destination-pattern in a dial-peer.
SIP Route Pattern over a SIP Trunk.
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
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

19. How do you enable AAR system wide?
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
CUCM Service Parameters --> Automated Alternate Routing Enable --> True
Mobile Voice Access
Debug ephone moh

20. Does CUCM support RSVP natively?
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 it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).

21. How do you convert a full PRI 9config'd by ccm-manager config server) back to a Fractional PRI?
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
In CUCM - configure CFUR to point to it's E164 number.

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 maintain 4-digit dialing to phones that are running in an SRST scenario (WAN outage)?

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23. How do you setup AutoRegistration in CUCM?
Ccm-manager music-on-hold
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.

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

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25. How do you configure phone ports on a 3750?
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 .)
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup

26. When are digits stripped in a gateway?
In CUCM - configure CFUR to point to it's E164 number.
When configuring TEHO.
When they are explicitly matched in a destination-pattern in a dial-peer.
Mobile Connect

27. How do you support multiple codecs on a dialpeer?
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
Apply voice-class codec
Reroute when there is a WAN Outage.

28. What kind of relationship does an MGCP gateway have with CUCM?
SIP Dial Rules
Master/Slave relationship. CUCM controls it.
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.

29. On an H323 GW - how do you adjust the timers for redundancy hunting?
(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
Show ccm-manager
Call forwarding between voip to voip (when CUBE is in play)
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3

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

31. How do you ensure no inter-digit timeout fro SIP phones within CUCM?
When configuring TEHO.
Outbound dial-peers
SIP Dial Rules
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST

32. Need to Know||Anytime you have an external call - it needs to match on a route pattern.
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
#voice service voip| #no supplementary-service h225-notify cid-update
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

33. What is Mobile Voice Access?
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.
Reroute when there is a WAN Outage.
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name

34. When a device is roaming to a different site How does it get the Roaming Sensitive Settings from the Device Pool?
#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
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.

35. How do you set the Call Park Reversion Timer?
Precede the # with a > ... so 9011*>#
CUCM Service Parameters --> Call Park Reversion Timer
voice translation-profile|and|voice translation-rule
Reroute when here is WAN congestion.

36. How do you use the # as a string terminator within a SIP Dial Rule?
...
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
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
Precede the # with a > ... so 9011*>#

37. 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
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
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
It's best to strip digits at the voice port.

38. Name 4 useful show commands for active calls.
24kb/s
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
Reroute when here is WAN congestion.
Device Pool Locations

39. When you make a call and it results in a secondary dial-tone - What is this a symptom of?
Outbound dial-peers
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.
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
Call forwarding between voip to voip (when CUBE is in play)

40. How do you prevent toll fraud on 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
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 ....
SIP Dial Rules
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable

41. How do you see the details of calls coming in and out of the PRI?
Debug isdn q931
sh ephone reg|and|debug voip dialpeer
Apply it to the ephone.
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group

42. What is the Service Parameter to allow the phone that is picking ip to auto answer?
Show ccm-manager
Auto Call Pickup Enabled
SIP Dial Rules
+ [CC 1-3 digits] [National Number max 15 minus CC digits]

43. What is the full E164 format?
Debug ephone moh
Call Simulator. You can use to validate path from router to the PSTN.
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
Assign SIP Dial Rules

44. What does an H323 GW require that MGCP GWs do not?
When multiple sites use the same route pattern - do your digit manipulation on a route list.
Dial-peers
Proxy Line Mode has multiple icons on the phone.|Shared Line Mode has only one.
Phone number followed by domain name.|i.e. 3006@ipxcme.com

45. How do you see multicast packets being sent?
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
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 ....
Debug ephone moh

46. How do you enable AAR?
#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
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
SERVICE PARAMETER> Automated Alternate Routing Enable > True

47. 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
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
Mobile Voice Access

48. If you have an H323 Gateway at a siet where the phones are controlled by CUCM - what do you need from a dial-peer perspective?
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
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.
Reroute when here is WAN congestion.
To enable two-stage dialing.

49. 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.
Mobile Voice Access
To notify SIP Phones of NTP
Automatically configures the MGCP GW for you.

50. How do you configure CUCM redundancy on an H323 gateway?
The Called/Calling Transformations are superceded.
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'
Debug ephone moh
#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