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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. When a CUCM device dials a number - what happens?
In the CUCM 7.0.1 Release Notes ... search for <i>restore</i>.
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie
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 .)
(config)#<i>sh cdp neigh detail
2. What are the commands to configure a T1/E1 PRI?
Assign SIP Dial Rules
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
(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
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
3. How do you configure class of service (CoS) in CUCM? CME?
Bandwidth
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
Service Parameter --> Block OffNet To OffNet Transfer --> <i>True</i>
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
4. What should you configure before entering auto qos?
Bandwidth
Debug ephone moh
<i>sh ephone reg</i>|and|<i>debug voip dialpeer</i>
TRUE
5. What is the full E164 format?
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
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
6. In CME Where is the Calling Name derived from?
1 ... this is not optional!
The <i>name</i> configuration field in ephone-dn and voice register dn
Bottom up - to prevent glare.
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
7. How do you configure a gateway to register with gatekeeper?
...
SIP Dial Rules
#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 - 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
8. Two useful troubleshooting commands for CUCME?
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie
<i>sh ephone reg</i>|and|<i>debug voip dialpeer</i>
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
Service Parameters --> <i>Mobile Voice Access Number</i>
9. 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?
...
Automatically configures the MGCP GW for you.
(config)#voice register dialplan
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
10. How do you prioritize route groups?
When configuring TEHO.
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
24kb/s
Put them in a route list.
11. What are the base telephony-service commands for CME?
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
12. How do you change modes in <i>voice register global</i>?
Reroute when there is a WAN Outage.
Default is SRST||<i>mode cme</i> changes to CME|<i>no mode cme</i> changes back to SRST
SIP Dial Rules
13. If you need terminate and reoriginate all calls through the CUBE - what do you need to do.
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
Sh ip rsvp reservation||sh sccp connections
14. How do you ensure no inter-digit timeout fro SIP phones within CUCM?
When they are explicitly matched in a destination-pattern in a dial-peer.
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
SIP Dial Rules
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
15. How do you prevent toll fraud on CUCM?
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.
It's best to strip digits at the voice port.
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
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
16. What does <i>rule 1 /^.*(....$)/ /1/</i> do?
Assign a logout-profile to the ephone.
When they are explicitly matched in a destination-pattern in a dial-peer.
Matches any length dialed number and truncates it to 4 digits.
Configure it on the route group through the route list - then it will be local to the route list.
17. How do you enable AAR system wide?
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.
CUCM Service Parameters --> Automated Alternate Routing Enable --> <i>True</i>
Service Parameters --> <i>Mobile Voice Access Number</i>
...
18. How much bandwidth does a G.729 call including layer 3 require?
On CUCM it's identical to adding an H323 GW.
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
24kb/s
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
19. How do you block calls under call-manager-fallback?
Sh ccm-manager
To enable two-stage dialing.
<i>#after-hours block pattern</i>
System Cisco Unified CM|Uncheck the box <i>Auto-Reg Disabled</i>||Enterprise Parameters --> <i>Auto Registration Phone Protocol</i> SIP or SCCP
20. 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?
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.
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
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
21. What are the commands to manually configure an MGCP gateway?
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)
#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
<i>Auto Call Pickup Enabled</i>
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
22. How do you see the details of calls coming in and out of the PRI?
<i>Proxy Line Mode</i> has multiple icons on the phone.|<i>Shared Line Mode</i> has only one.
Debug isdn q931
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
...
23. On an H323 GW - how do you adjust the timers for redundancy hunting?
<i>h225 timeout tcp establish 3</i> within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
(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
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
24. What must you do for a BACD script to work on a CME router?
(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
Enable MOH on the CME.||#<i>telephony service</i>|#<i>moh music-on-hold.au</i>
...
<i>SIP Route Pattern</i> over a SIP Trunk.
25. How do you maintain 4-digit dialing to phones that are running in an SRST scenario (WAN outage)?
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26. How do you enable AAR?
Automatically configures the MGCP GW for you.
In CUCM - configure CFUR to point to it's E164 number.
SERVICE PARAMETER> Automated Alternate Routing Enable > True
#test voice translation rule 1 <input to test>
27. What kind of relationship does an MGCP gateway have with CUCM?
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
In CUCM - configure CFUR to point to it's E164 number.
Master/Slave relationship. CUCM controls it.
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
28. What are the steps to configure Single Number Reach and Mobile Voice Access?
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 .)
The Called/Calling Transformations are superceded.
When they are explicitly matched in a destination-pattern in a dial-peer.
29. How do you allow H323 calls to be preserved should the primary H323 GW fail?
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
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)
30. How do you configure phone ports on a 3750?
In CUCM - configure CFUR to point to it's E164 number.
<b>Access Port Method</b>||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
(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
Via the <i>voice hunt-group parallel</i> command
31. How do you prevent toll fraud on CME?
<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 ....
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie
Service Parameter --> Block OffNet To OffNet Transfer --> <i>True</i>
32. Name 4 useful show commands for active calls.
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
At the CLI: <i>utils ntp status</i>
<i>Auto Call Pickup Enabled</i>
Debug isdn q931
33. What is call-forward pattern used for?
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
Call forwarding between voip to voip (when CUBE is in play)
When they are explicitly matched in a destination-pattern in a dial-peer.
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
34. What does <i>ccm-manager config server [IP]</ip> do?
Automatically configures the MGCP GW for you.
#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
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec <i>Disable</i>
35. What CUCM services should you activate?
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
(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
36. How do you support multiple codecs on a dialpeer?
To enable two-stage dialing.
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
<b>CAT IOS</b>|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
Apply <i>voice-class codec</i>
37. What are the basic SCCP Commands fro telephony-service in CUCME?
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec <i>Disable</i>
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
38. What does an H323 GW require that MGCP GWs do not?
Dial-peers
CUCM OS Administration Settings --> NTP Servers
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.
When they are explicitly matched in a destination-pattern in a dial-peer.
39. How do you set up redundancy on outbound dial-peers on an H323 gateway?
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
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
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
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
40. How do you test a Voice Translation Rule?
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
(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
#test voice translation rule 1 <input to test>
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
41. 'How do you inform a SIP phone of NTP information?
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
24kb/s
#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
#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
42. How do you verify that NTP is working on the CUCM server?
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>|| Block Offnet to Offnet Transfer - Set to True
...
At the CLI: <i>utils ntp status</i>
43. In CUCME what SIP config command is equivalent to ephone and ephone-dn?
<i>voice register pool</i>|and|<i>voice register dn</i>
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)
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
...
44. What terminology translates to SRST?
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> Automated Alternate Routing Enable > True
Reroute when there is a WAN Outage.
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
45. Is the + character supported on a VOIP dial-peer?
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46. How do you get around relying on DNS for your CUCMs?
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec <i>Disable</i>
Max-dn|max-ephone|ip source-address
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
(config)#<i>sh cdp neigh detail
47. On an MGCP GW - if you select <i>Top Down</i> under Channel Selection Order - What does that mean?
Show ccm-manager
(config)#voice register dialplan
Top Down means that channel 1 will be the first channel used to place outgoing calls.
Call Simulator. You can use to validate path from router to the PSTN.
48. What does Display-IE do?
Sends the Calling Name.
'Service Parameters --> <i>Auto Answer Timer</i>
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
#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
49. '<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
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.
Dtmf-relay h245-alpha
...
Debug isdn q931
50. What is a best practice for digit manipulation - in regards to H323 GWs?
(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
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
(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
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
Can you answer 50 questions in 15 minutes?
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