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Test your basic knowledge |
CCIE Voice Test
Start Test
Study First
Subjects
:
cisco
,
it-skills
,
ccie
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 much bandwidth does a G.729 call including layer 3 require?
1 ... this is not optional!
24kb/s
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
On CUCM -- UPTSAL||Create Your <b>Users</b>|<b>Phone</b> - set owner id|Create SIP <b>Trunk</b>|<b>SIP Trunk Security Profile|</b>|<b>Application Server</b>|<b>Licensing|</b>|||On CUPS||Work Left to right
2. What are the basic SCCP Commands fro telephony-service in CUCME?
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
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
Single Number Reach (Mobile Connect)
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
3. 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.
TRUE
Create 2 voip dial-peers - one the Sub and one to the Pub (the Pub with a preference of 1). Then create a <i>voice class h323</i>and set the <i>h225 timeout</i> value so it will hunt between the two.
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. Maximum Wait Time for Desk Pickup?
Outbound dial-peers
...
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
5. '<b>By Nov. 16 - 2010</b>||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
IP Voice Media Streaming App
Higher
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
...
6. How do you setup AutoRegistration in CUCM?
Show ccm-manager
System Cisco Unified CM|Uncheck the box <i>Auto-Reg Disabled</i>||Enterprise Parameters --> <i>Auto Registration Phone Protocol</i> SIP or SCCP
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
7. How can you confirm the MGCP GW is registered to CUCM - in IOS?
Sh ccm-manager
CUCM OS Administration Settings --> NTP Servers
Show ccm-manager
<i>voice translation-profile</i>|and|<i>voice translation-rule</i>
8. 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
Configure it on the route group through the route list - then it will be local to the route list.
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
9. What is the bit rate for a G.729 call excluding layer 2?
8kb/s
(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
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
10. How is NTP sych setup in CUCM?
CUCM OS Administration Settings --> NTP Servers
Put them in a route list.
...
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
11. When do you use translate called? Translate calling?
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)
<b>Access Port Method</b>||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|<i>utils csa disable</i>
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
12. On an H323 GW - how do you adjust the timers for redundancy hunting?
Default is SRST||<i>mode cme</i> changes to CME|<i>no mode cme</i> changes back to SRST
<i>h225 timeout tcp establish 3</i> within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
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 ....
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec <i>Disable</i>
13. Where is it best to manipulate digits for inbound calls?
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14. If you're using Called/Calling Party Transformations at the Route Pattern and tranformations at the route list ... What does the RP affect and What does the RL affect?
Assign a logout-profile to the ephone.
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
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
Higher
15. 'How do you inform a SIP phone of NTP information?
Mobile Connect
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit
16. What is a best practice for digit manipulation - in regards to H323 GWs?
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
Call Simulator. You can use to validate path from router to the PSTN.
<i>Auto Call Pickup Enabled</i>
Device Pool Locations
17. What would force you to use telephony-service to configure SRST?
In CUCM - configure CFUR to point to it's E164 number.
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
Enable MOH on the CME.||#<i>telephony service</i>|#<i>moh music-on-hold.au</i>
On CUCM it's identical to adding an H323 GW.
18. How can you tell the difference between Proxy Line Mode and Shared Line Mode by just looking at the phone?
...
<i>Proxy Line Mode</i> has multiple icons on the phone.|<i>Shared Line Mode</i> has only one.
The Called/Calling Transformations are superceded.
SIP Dial Rules
19. Where can you assign the AAR Group?
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
Create 2 voip dial-peers - one the Sub and one to the Pub (the Pub with a preference of 1). Then create a <i>voice class h323</i>and set the <i>h225 timeout</i> value so it will hunt between the two.
Sh ip rsvp reservation||sh sccp connections
#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
20. On the RDP What is the CSS used for?
Sh ccm-manager
<i>SIP Route Pattern</i> over a SIP Trunk.
(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
Mobile Voice Access
21. 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
Sends the Calling Name.
Allows you to transfer by only pressing the Transfer button once.
Default is SRST||<i>mode cme</i> changes to CME|<i>no mode cme</i> changes back to SRST
22. Does CUCM support RSVP natively?
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
...
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
23. What is call-forward pattern used for?
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
Precede the # with a > ... so 9011*>#
Call forwarding between voip to voip (when CUBE is in play)
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
24. How do you get around relying on DNS for your CUCMs?
Max-dn|max-ephone|ip source-address
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
25. What are the commands to create vlans on an ESW?
SERVICE PARAMETER> Automated Alternate Routing Enable > True
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit
When configuring TEHO.
26. What CM Service needs to be start in Serviceability for MOH to work?
The Called/Calling Transformations are superceded.
IP Voice Media Streaming App
Max-dn|max-ephone|ip source-address
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
27. In Gatekeeper CAC how do you restrict a specific endpoint?
Sh ccm-manager
(config)#voice register dialplan
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
28. What must you do for a BACD script to work on a CME router?
Enable MOH on the CME.||#<i>telephony service</i>|#<i>moh music-on-hold.au</i>
<b>Access Port Method</b>||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
29. When do you do digit manipulation at the route pattern as opposed to the route list?
<i>sh ephone reg</i>|and|<i>debug voip dialpeer</i>
Automatically configures the MGCP GW for you.
Enterprise Parameters --> <i>Organization Top Level Domain</i>|Enterprise Parameters --> <i>Cluster Fully Qualified Domain Name</i>
When multiple sites use the same route pattern - do your digit manipulation on a route list.
30. How do you allow the Calling Name to be sent to the PSTN on a router?
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie
To notify SIP Phones of NTP
Put them in a route list.
31. How do you set the inter-digit timeout for SIP phones in CME?
On CUCM -- UPTSAL||Create Your <b>Users</b>|<b>Phone</b> - set owner id|Create SIP <b>Trunk</b>|<b>SIP Trunk Security Profile|</b>|<b>Application Server</b>|<b>Licensing|</b>|||On CUPS||Work Left to right
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
Sends the Calling Name.
(config)#voice register dialplan
32. Aside from the <i>Media Resources --> Mobile Voice Access</i> where else do you need to specify the the Mobile Voice Access DN?
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
Create 2 voip dial-peers - one the Sub and one to the Pub (the Pub with a preference of 1). Then create a <i>voice class h323</i>and set the <i>h225 timeout</i> value so it will hunt between the two.
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 Parameters --> <i>Mobile Voice Access Number</i>
33. How do you configure class of service (CoS) in CUCM? CME?
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
Use the <i>alias static</i> configuration||alias static (IP of CUCM) gkid (GK ID) gateway voip ras (IP of CUCM) e164 (dn) e164 (dn) e164 (dn)
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
34. 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?
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
Use the <i>alias static</i> configuration||alias static (IP of CUCM) gkid (GK ID) gateway voip ras (IP of CUCM) e164 (dn) e164 (dn) e164 (dn)
CUCM Service Parameters --> <i>Call Park Reversion Timer</i>
8kb/s
35. What are the commands to configure NTP in IOS?
Assign SIP Dial Rules
In CUCM - configure CFUR to point to it's E164 number.
Matches any length dialed number and truncates it to 4 digits.
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
36. How do you maintain 4-digit dialing to phones that are running in an SRST scenario (WAN outage)?
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37. On an MGCP GW - if you select <i>Top Down</i> under Channel Selection Order - What does that mean?
On CUCM -- UPTSAL||Create Your <b>Users</b>|<b>Phone</b> - set owner id|Create SIP <b>Trunk</b>|<b>SIP Trunk Security Profile|</b>|<b>Application Server</b>|<b>Licensing|</b>|||On CUPS||Work Left to right
Top Down means that channel 1 will be the first channel used to place outgoing calls.
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
Debug isdn q931
38. What does Display-IE do?
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
Sends the Calling Name.
Use the <i>alias static</i> configuration||alias static (IP of CUCM) gkid (GK ID) gateway voip ras (IP of CUCM) e164 (dn) e164 (dn) e164 (dn)
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
39. What are the base telephony-service commands for CME?
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
When they are explicitly matched in a destination-pattern in a dial-peer.
40. How do you disable KPML?
Bottom up - to prevent glare.
Find the GUI Files - show flash | i .html|<i>ip http server</i>|<i>ip http path flash:/<PATH TO FILES></i>||telephony service|web admin system name admin pass cisco|dn-webedit
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
Assign SIP Dial Rules
41. Calls coming from CUCM to PSTN need what?
<i>voice register pool</i>|and|<i>voice register dn</i>
Outbound dial-peers
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
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
42. How do you configure CUBE?
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43. What is the full E164 format?
Default is SRST||<i>mode cme</i> changes to CME|<i>no mode cme</i> changes back to SRST
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
On CUCM it's identical to adding an H323 GW.
44. Two useful troubleshooting commands for CUCME?
Apply <i>voice-class codec</i>
<i>sh ephone reg</i>|and|<i>debug voip dialpeer</i>
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
Automatically configures the MGCP GW for you.
45. If the PSTN is presenting on channel 1 - should you configure CUCM to search 'top down' or 'bottom up'?
Bottom up - to prevent glare.
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 ... this is not optional!
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
46. What dtmf-relay type do you use for an H323 GW?
Dtmf-relay h245-alpha
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
<i>h225 timeout tcp establish 3</i> within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
Reroute when here is WAN congestion.
47. What should you configure before entering auto qos?
Bandwidth
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
Reroute when there is a WAN Outage.
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
48. What are the 3 mandatory commands within 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.
(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
<i>sh ephone reg</i>|and|<i>debug voip dialpeer</i>
Max-dn|max-ephone|ip source-address
49. When using GK redundancy - what must you do to ensure both SUB and PUB use port 1720 for call-signalling.
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50. Privacy is enabled system-wide in CUCM by default. (T or F)
Need to Know||Anytime you have an external call - it needs to match on a route pattern.
Outbound dial-peers
TRUE
It's best to strip digits at the voice port.