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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 is the Service Parameter to allow the phone that is picking ip to auto answer?
To enable two-stage dialing.
#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
Master/Slave relationship. CUCM controls it.
Auto Call Pickup Enabled

2. What are the basic SCCP Commands fro telephony-service in CUCME?
Automatically configures the MGCP GW for you.
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie
Allows you to transfer by only pressing the Transfer button once.
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files

3. 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 ....
Call forwarding between voip to voip (when CUBE is in play)
To enable two-stage dialing.
No POTS dial-peer or no direct-inward-dial on a pots dial-peer

4. How do you configure SIP phones to be able to call other SIP phones via SIP URI?
sh ephone reg|and|debug voip dialpeer
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
In CUCM - configure CFUR to point to it's E164 number.
SIP Route Pattern over a SIP Trunk.

5. 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
Sh ccm-manager
Top Down means that channel 1 will be the first channel used to place outgoing calls.
1 ... this is not optional!

6. How do you block an external call from being transferred back out to the pstn by an internal user?
Service Parameter --> Block OffNet To OffNet Transfer --> True
Apply voice-class codec
CUCM OS Administration Settings --> NTP Servers
#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

7. What are the commands to set up the PRI?

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8. When can you not use a Standard Local Route Group?
...
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
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
When configuring TEHO.

9. How do you ensure an H323 GW always uses the Sub as primary and Pub as a backup?
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.
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.
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.
Service Parameter --> Block OffNet To OffNet Transfer --> True

10. What are the commands to create the L3 routing interface for VLANS (SVI)?
voice register pool|and|voice register dn
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
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

11. How do you create a trunk on the router side?
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
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
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
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 ....

12. What command is needed on a gateway for it to invoke the DSP to convert multicast MOH stream to TDM?
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
Assign a logout-profile to the ephone.
Ccm-manager music-on-hold
Redundant dial plan. One on CUCM and one on the routers via dial-peers.

13. 'If you're not getting a DHCP address from CUCM what then?
Dtmf-relay h245-alpha
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
...

14. 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
Sh ip rsvp reservation||sh sccp connections
When multiple sites use the same route pattern - do your digit manipulation on a route list.
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs

15. 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.
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
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'

16. Does CUCM support RSVP natively?
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
IP Voice Media Streaming App
Ccm-manager music-on-hold
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.

17. How do you support multiple codecs on a dialpeer?
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
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 ....
voice register pool|and|voice register dn
Apply voice-class codec

18. What are the commands to configure NTP in IOS?
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 ....
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
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage

19. Maximum Wait Time for Desk Pickup?
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 ....
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
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.

20. How do you enable Extension Mobility for a device in CME?
Assign a logout-profile to the ephone.
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
It's best to strip digits at the voice port.
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.

21. What is the Enable Enterprise Feature Access Service Parameter used for?
'Service Parameters --> Auto Answer Timer
To enable two-stage dialing.
Master/Slave relationship. CUCM controls it.
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 ....

22. What kind of relationship does an MGCP gateway have with CUCM?
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
Master/Slave relationship. CUCM controls it.
#voice service voip| #no supplementary-service h225-notify cid-update

23. How do you set the Call Park Reversion Timer?
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
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)
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
CUCM Service Parameters --> Call Park Reversion Timer

24. On an H323 GW - how do you adjust the timers for redundancy hunting?
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
...
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3

25. In Gatekeeper CAC how do you restrict a specific endpoint?
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
#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
24kb/s
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

26. What are the basic ephone-dn and ephone commands?
The Called/Calling Transformations are superceded.
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
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
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

27. 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.
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
...
When they are explicitly matched in a destination-pattern in a dial-peer.

28. Is the order of the MRGs in an MRGL significant?
(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.
TRUE

29. How do you set up redundancy on outbound dial-peers on an H323 gateway?
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
To enable two-stage dialing.

Automatically configures the MGCP GW for you.

30. When using drop-through-option What is the max number of huntgroups?
SIP Route Pattern over a SIP Trunk.
1 ... this is not optional!
(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
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit

31. How do you enable AAR?
SERVICE PARAMETER> Automated Alternate Routing Enable > True
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
In the CUCM 7.0.1 Release Notes ... search for restore.
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.

32. How do do configure TEHO?
The Called/Calling Transformations are superceded.
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)
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.

33. How is NTP sych setup in CUCM?
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
Assign SIP Dial Rules
When multiple sites use the same route pattern - do your digit manipulation on a route list.
CUCM OS Administration Settings --> NTP Servers

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

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35. What's the difference between AAR and SRST?
Show ccm-manager
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
Automatically configures the MGCP GW for you.
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage

36. How do you allow the Calling Name to be sent to the PSTN on a router?
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
Re-enter the mgcp bind control and mgcp bind media commands.
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie

37. What terminology translates to AAR?
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 ....
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
Reroute when here is WAN congestion.
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup

38. How do you create a trunk on the switch side?
Debug ephone moh
Auto Call Pickup Enabled
24kb/s
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!

39. What are two caveats to using the ccm-manager config server</ip> command?

Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
At the CLI: utils ntp status
#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

40. How do you convert a full PRI 9config'd by ccm-manager config server) back to a Fractional PRI?
+ [CC 1-3 digits] [National Number max 15 minus CC digits]

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
Reroute when here is WAN congestion.

41. What are the commands to configure SIP phones in CME?
#voice service voip| #no supplementary-service h225-notify cid-update
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
voice register pool|and|voice register dn
To enable two-stage dialing.

42. If you can't use a tech-prefix or default tech-prefix how do you get around the fact that CUCM does not register it's endpoint to GK?
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)
Dtmf-relay h245-alpha
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
Debug isdn q931

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

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44. On the RDP What is the CSS used for?
Mobile Voice Access
Matches any length dialed number and truncates it to 4 digits.

45. How do you get around relying on DNS for your CUCMs?
Service Parameter --> Block OffNet To OffNet Transfer --> True
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
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.
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

46. Privacy is enabled system-wide in CUCM by default. (T or F)
Sh ip rsvp reservation||sh sccp connections
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
TRUE
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.

47. How would you verify that DHCP is working in IOS?
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
(config)#sh cdp neigh detail
SIP Dial Rules
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

48. When are digits stripped in a gateway?
When they are explicitly matched in a destination-pattern in a dial-peer.
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
#voice service voip| #no supplementary-service h225-notify cid-update

49. What are the base telephony-service commands for CME?
24kb/s
(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
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary

50. How do you block calls under call-manager-fallback?
On CUCM it's identical to adding an H323 GW.
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.

#after-hours block pattern