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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. How do you use the # as a string terminator within a SIP Dial Rule?
It's best to strip digits at the voice port.
Precede the # with a > ... so 9011*>#
CUCM Service Parameters --> Automated Alternate Routing Enable --> True
Call Simulator. You can use to validate path from router to the PSTN.

2. 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
(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

#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

3. Calls coming from CUCM to PSTN need what?
SERVICE PARAMETER> Automated Alternate Routing Enable > True
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
Outbound dial-peers
...

4. What command is needed on a gateway for it to invoke the DSP to convert multicast MOH stream to TDM?
(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
Ccm-manager music-on-hold
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
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

5. Where can you assign the AAR Group?
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.
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
24kb/s
Reroute when there is a WAN Outage.

6. How can you confirm the MGCP GW is registered to CUCM - in IOS?
Service Parameter --> Block OffNet To OffNet Transfer --> True
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
Dtmf-relay h245-alpha
Sh ccm-manager

7. How do you enable AAR?
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
'Use before the ... so XXXX
SERVICE PARAMETER> Automated Alternate Routing Enable > True
#after-hours block pattern

8. How do you configure a gateway to register with gatekeeper?
Reroute when here is WAN congestion.
#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
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)

9. What is call-forward pattern used for?
Call forwarding between voip to voip (when CUBE is in play)
#after-hours block pattern
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
Mobile Connect

10. What are the commands to create the L3 routing interface for VLANS (SVI)?
Debug ephone moh
#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
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
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.

11. Name 4 useful show commands for active calls.
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
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
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
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary

12. How do you enable Extension Mobility for a device in CME?
Assign a logout-profile to the ephone.
24kb/s
Mobile Voice Access
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

13. How do do configure TEHO?
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
Re-enter the mgcp bind control and mgcp bind media commands.
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
Assign a logout-profile to the ephone.

14. What is the Enable Enterprise Feature Access Service Parameter used for?
To enable two-stage dialing.
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
Debug isdn q931
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

15. What would force you to use telephony-service to configure SRST?
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
(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

16. How do you configure CUBE?

17. How do you block calls under call-manager-fallback?
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
#after-hours block pattern
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!

18. What dtmf-relay type do you use for an H323 GW?
8kb/s
Dtmf-relay h245-alpha
Ccm-manager music-on-hold
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.

19. What's the difference between AAR and SRST?
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
voice translation-profile|and|voice translation-rule
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage

20. When a device is roaming to a different site How does it get the Roaming Sensitive Settings from the Device Pool?
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
Service Parameters --> Mobile Voice Access Number
No POTS dial-peer or no direct-inward-dial on a pots dial-peer

21. What terminology translates to AAR?
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name
Reroute when here is WAN congestion.

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

23. What does ccm-manager config server [IP]</ip> do?
#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
Configure it on the route group through the route list - then it will be local to the route list.
Automatically configures the MGCP GW for you.
Need to Know||Anytime you have an external call - it needs to match on a route pattern.

24. What is Phone NTP Reference used for?
To notify SIP Phones of NTP
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
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

25. What do you need to do to activate the CME GUI?
When multiple sites use the same route pattern - do your digit manipulation on a route list.
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
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group

26. 'If you're not getting a DHCP address from CUCM what then?
On CUCM it's identical to adding an H323 GW.
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
(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
+ [CC 1-3 digits] [National Number max 15 minus CC digits]

27. If you're using Called/Calling Party Transformations at the Route Pattern - what happens if you do Digit manipulation at the route list?
Reroute when here is WAN congestion.
The Called/Calling Transformations are superceded.
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)
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.

28. Does CUCM support RSVP natively?
'Service Parameters --> Auto Answer Timer
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
Max-dn|max-ephone|ip source-address
The Called/Calling Transformations are superceded.

29. 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?
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
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)
24kb/s
Mobile Voice Access

30. 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.
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
sh ephone reg|and|debug voip dialpeer
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 .)

31. How do you set up redundancy on outbound dial-peers on an H323 gateway?
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
Mobile Connect
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)

32. How do you verify that NTP is working on the CUCM server?
It's best to strip digits at the voice port.
'Service Parameters --> Auto Answer Timer
At the CLI: utils ntp status
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.

33. When using GK redundancy - what must you do to ensure both SUB and PUB use port 1720 for call-signalling.

34. When a CUCM device dials a number - what happens?
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
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 .)
24kb/s
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.

35. What does an H323 GW require that MGCP GWs do not?
Assign SIP Dial Rules
Dial-peers
24kb/s
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files

36. Aside from the Media Resources --> Mobile Voice Access where else do you need to specify the the Mobile Voice Access DN?
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.

Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
Service Parameters --> Mobile Voice Access Number

37. When you make a call and it results in a secondary dial-tone - What is this a symptom of?
Higher
Auto Call Pickup Enabled
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
CUCM - Partitions and Calling Search Spaces||CME - COR Lists

38. What are the basic SCCP Commands fro telephony-service in CUCME?
...
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
Apply it to the ephone.
Service Parameter --> Block OffNet To OffNet Transfer --> True

39. 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.
The name configuration field in ephone-dn and voice register dn
Proxy Line Mode has multiple icons on the phone.|Shared Line Mode has only one.
Sh ccm-manager

40. What does KPML do?
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
Ccm-manager music-on-hold
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
When they are explicitly matched in a destination-pattern in a dial-peer.

41. Privacy is enabled system-wide in CUCM by default. (T or F)
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
TRUE
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

42. 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
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)
Matches any length dialed number and truncates it to 4 digits.

43. On a gatekeeper trunk - how do you ensure the Sub is used as primary and Pub as backup?
Mobile Voice Access
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
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)

44. How do you configure SIP phones to be able to call other SIP phones via SIP URI?
Service Parameter --> Block OffNet To OffNet Transfer --> True
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
SIP Route Pattern over a SIP Trunk.
#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

45. On an MGCP GW - how could you see the primary and backup CUCM servers?
#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
Apply voice-class codec
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
Show ccm-manager

46. When using drop-through-option What is the max number of huntgroups?
Phone number followed by domain name.|i.e. 3006@ipxcme.com
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
1 ... this is not optional!

47. What is SIP URI?
(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
Phone number followed by domain name.|i.e. 3006@ipxcme.com
(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
Auto Call Pickup Enabled

48. What is a best practice for digit manipulation - in regards to H323 GWs?
To notify SIP Phones of NTP
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
...
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3

49. Need to Know||Anytime you have an external call - it needs to match on a route pattern.
Re-enter the mgcp bind control and mgcp bind media commands.
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
Service Parameter --> Block OffNet To OffNet Transfer --> True
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.

50. What are the commands to manually configure an MGCP gateway?
#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
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
Assign a logout-profile to the ephone.
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!