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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 ensure no inter-digit timeout fro SIP phones within CUCM?
On CUCM it's identical to adding an H323 GW.
Auto Call Pickup Enabled
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
SIP Dial Rules

2. What CM Service needs to be start in Serviceability for MOH to work?
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
IP Voice Media Streaming App
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)

3. How do you ensure that G.711 only is used?
Single Number Reach (Mobile Connect)
Reroute when here is WAN congestion.
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.

4. 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?
CUCM Service Parameters --> Call Park Reversion Timer
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 ....
(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
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)

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

6. What does KPML do?
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
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
Precede the # with a > ... so 9011*>#
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.

7. SNR is also known as?
Mobile Connect
CUCM Service Parameters --> Automated Alternate Routing Enable --> True
Reroute when there is a 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.

8. What should you configure before entering auto qos?
It's best to strip digits at the voice port.
Bandwidth
(config)#sh cdp neigh detail
When configuring TEHO.

9. When using drop-through-option What is the max number of huntgroups?
24kb/s
1 ... this is not optional!
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
(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

10. How do you prioritize route groups?
When they are explicitly matched in a destination-pattern in a dial-peer.
Bottom up - to prevent glare.
(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
Put them in a route list.

11. When you make a call and it results in a secondary dial-tone - What is this a symptom of?
Apply voice-class codec
On CUCM it's identical to adding an H323 GW.
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
24kb/s

12. In CUCME what SIP config command is equivalent to ephone and ephone-dn?
CUCM Service Parameters --> Automated Alternate Routing Enable --> True
voice register pool|and|voice register dn
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name
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

13. What is the Service Parameter to allow the phone that is picking ip to auto answer?
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
Auto Call Pickup Enabled
When multiple sites use the same route pattern - do your digit manipulation on a route list.
Phone number followed by domain name.|i.e. 3006@ipxcme.com

14. 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?
Dial-peers
Assign SIP Dial Rules
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.
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.

15. '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
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
...
To notify SIP Phones of NTP

16. What is Mobile Voice Access?
When they are explicitly matched in a destination-pattern in a dial-peer.
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group

17. 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.
At the CLI: utils ntp status
SIP Route Pattern over a SIP Trunk.
CUCM OS Administration Settings --> NTP Servers

18. What must you do for a BACD script to work on a CME router?
When configuring TEHO.
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
Allows you to transfer by only pressing the Transfer button once.
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup

19. How do you disable KPML?
Assign SIP Dial Rules
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
The name configuration field in ephone-dn and voice register dn

20. What are the commands to configure an H323 GW?
#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
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
Debug ephone moh
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.

21. 'How do you inform a SIP phone of NTP information?
voice translation-profile|and|voice translation-rule
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.
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
Proxy Line Mode has multiple icons on the phone.|Shared Line Mode has only one.

22. Describe the relationship between route patterns and end devices.
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
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.

Matches any length dialed number and truncates it to 4 digits.

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

24. What command is needed on a gateway for it to invoke the DSP to convert multicast MOH stream to TDM?
Allows you to transfer by only pressing the Transfer button once.
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
Ccm-manager music-on-hold
(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

25. How do you prevent toll fraud on CME?
'Use before the ... so XXXX
#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
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
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 ....

26. What kind of relationship does an MGCP gateway have with CUCM?
Call-manager-fallback or telephony-service mode SRST
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
Master/Slave relationship. CUCM controls it.
(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

27. What are the commands to ensure an H323 GW always uses the Sub as primary and Pub as a backup?
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
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||#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
IP Voice Media Streaming App

28. In CME Where is the Calling Name derived from?
Service Parameter --> Block OffNet To OffNet Transfer --> True
The name configuration field in ephone-dn and voice register dn
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
voice register pool|and|voice register dn

29. What are the commands to configure SIP phones in 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
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.
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
The name configuration field in ephone-dn and voice register dn

30. What terminology translates to SRST?
Reroute when there is a WAN Outage.
Mobile Connect
#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
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files

31. In a SIP Dial Rule how do you represent a dialed * instead of it being used as a wildcard?

32. What is SIP URI?
Phone number followed by domain name.|i.e. 3006@ipxcme.com
'Service Parameters --> Auto Answer Timer
...
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones

33. On the RDP What is the CSS used for?
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
Mobile Voice Access
Sh ip rsvp reservation||sh sccp connections
Max-dn|max-ephone|ip source-address

34. Two useful troubleshooting commands for CUCME?
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
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
sh ephone reg|and|debug voip dialpeer
...

35. How do you configure AAR?
24kb/s
Re-enter the mgcp bind control and mgcp bind media commands.
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
(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

36. How do you allow H323 calls to be preserved should the primary H323 GW fail?
Bandwidth
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
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.

37. What are the commands to manually configure an MGCP gateway?
'Service Parameters --> Auto Answer Timer
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
#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
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.

38. Describe how you configure SIP URI functionality.
#voice service voip| #no supplementary-service h225-notify cid-update

Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
SIP Route Pattern over a SIP Trunk.

39. Is the order of the MRGs in an MRGL significant?
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.
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)
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3

40. What's the difference between AAR and SRST?
AAR -- Used for WAN Congestion|SRST -- Used for 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.
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
Via the voice hunt-group parallel command

41. How much bandwidth does a G.729 call including layer 3 require?
8kb/s
24kb/s
sh ephone reg|and|debug voip dialpeer
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM

42. What are the commands to create the L3 routing interface for VLANS (SVI)?
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
Phone number followed by domain name.|i.e. 3006@ipxcme.com
To notify SIP Phones of NTP
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

43. What would force you to use telephony-service to configure SRST?
#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
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

44. What is the bit rate for a G.729 call excluding layer 2?
(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
8kb/s
Call Simulator. You can use to validate path from router to the PSTN.
(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

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

46. What are the basic SCCP Commands fro telephony-service in CUCME?
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
SIP Dial Rules
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files

47. How do you use the # as a string terminator within a SIP Dial Rule?
Precede the # with a > ... so 9011*>#
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
#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
Top Down means that channel 1 will be the first channel used to place outgoing calls.

48. When setting up SIP URI where do you configure the CUCM's domain name?'
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name
When they are explicitly matched in a destination-pattern in a dial-peer.
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
#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

49. What are the commands to configure NTP in IOS?
#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

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
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify

50. What are the steps to configure Single Number Reach and Mobile Voice Access?

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
Higher
(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