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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.
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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 can you confirm the MGCP GW is registered to CUCM - in IOS?
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)
Max-dn|max-ephone|ip source-address
Sh ccm-manager
Apply voice-class codec

2. SNR is also known as?
Apply it to the ephone.
Mobile Connect
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
CUCM Service Parameters --> Call Park Reversion Timer

3. What types of digit manipulation can you perform at the route pattern?
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
Apply it to the ephone.
Proxy Line Mode has multiple icons on the phone.|Shared Line Mode has only one.
#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

4. How do you configure an MGCP GW? (router side)
To notify SIP Phones of NTP
(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
Dial-peers
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary

5. Aside from the Media Resources --> Mobile Voice Access where else do you need to specify the the Mobile Voice Access DN?
Service Parameters --> Mobile Voice Access Number
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
Apply it to the ephone.
(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

6. Need to Know||Anytime you have an external call - it needs to match on a route pattern.
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
(config)#voice register dialplan
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
Need to Know||Anytime you have an external call - it needs to match on a route pattern.

7. How do you use an ephone template?
Apply it to the ephone.
Bandwidth
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.

8. How do you see the details of calls coming in and out of the PRI?
Debug isdn q931
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
Put them in a route list.
voice register pool|and|voice register dn

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

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10. What does the Transfer On-hook Enabled Service Parameter do?
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'
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
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.
Allows you to transfer by only pressing the Transfer button once.

11. What is the bit rate for a G.729 call excluding layer 2?
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||#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
8kb/s
Automatically configures the MGCP GW for you.

12. How do you ensure an H323 GW always uses the Sub as primary and Pub as a backup?
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
...
Service Parameter --> Block OffNet To OffNet Transfer --> True
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.

13. What is SIP URI?
#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
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
Phone number followed by domain name.|i.e. 3006@ipxcme.com
Ccm-manager music-on-hold

14. What terminology translates to AAR?
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
#test voice translation rule 1 <input to test>
Reroute when here is WAN congestion.
Bandwidth

15. What are the commands to configure SIP phones in CME?
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
24kb/s
Master/Slave relationship. CUCM controls it.
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

16. When you make a call and it results in a secondary dial-tone - What is this a symptom of?
To enable two-stage dialing.
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.
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
Outbound dial-peers

17. What does KPML do?
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
Max-dn|max-ephone|ip source-address
(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

18. What are the commands to configure NTP in IOS?
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
In the CUCM 7.0.1 Release Notes ... search for restore.
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify

19. How do you maintain 4-digit dialing to phones that are running in an SRST scenario (WAN outage)?

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20. In Gatekeeper CAC how do you restrict a specific endpoint?
The Called/Calling Transformations are superceded.
CUCM OS Administration Settings --> NTP Servers
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones

21. Describe the relationship between route patterns and end devices.
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
Call forwarding between voip to voip (when CUBE is in play)
Phone number followed by domain name.|i.e. 3006@ipxcme.com
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.

22. How do you test a Voice Translation Rule?
(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
#test voice translation rule 1 <input to test>
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)
Re-enter the mgcp bind control and mgcp bind media commands.

23. What should you configure before entering auto qos?
Bandwidth
Auto Call Pickup Enabled
#after-hours block pattern
To enable two-stage dialing.

24. When using drop-through-option What is the max number of huntgroups?
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
1 ... this is not optional!
Configure it on the route group through the route list - then it will be local to the route list.
Master/Slave relationship. CUCM controls it.

25. What is a best practice for digit manipulation - in regards to H323 GWs?
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
Bottom up - to prevent glare.
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files

26. How do you support multiple codecs on a dialpeer?
Apply voice-class codec
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
#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
#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

27. How do you place SCCP and SIP phones into a single huntgroup?
Device Pool Locations
To notify SIP Phones of NTP
Via the voice hunt-group parallel command
Show ccm-manager

28. What are the base telephony-service commands for CME?
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
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 ....
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
Redundant dial plan. One on CUCM and one on the routers via dial-peers.

29. What does ccm-manager config server [IP]</ip> do?
Automatically configures the MGCP GW for you.
Call forwarding between voip to voip (when CUBE is in play)
8kb/s
CUCM OS Administration Settings --> NTP Servers

30. When can you not use a Standard Local Route Group?
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
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
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
When configuring TEHO.

31. What is the Enable Enterprise Feature Access Service Parameter used for?
24kb/s
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
Dial-peers
To enable two-stage dialing.

32. What is the full E164 format?
#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
Debug isdn q931
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
...

33. A show isdn status shows TEI_ASSIGNED. What do you do to get MULTIPLE_FRAME_ESTABLISHED?
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
Re-enter the mgcp bind control and mgcp bind media commands.
#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
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.

34. On an MGCP GW - if you select Top Down under Channel Selection Order - What does that mean?
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
Top Down means that channel 1 will be the first channel used to place outgoing calls.
voice translation-profile|and|voice translation-rule
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3

35. What are the commands to manually configure an MGCP gateway?
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
Re-enter the mgcp bind control and mgcp bind media commands.
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
#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

36. What terminology translates to SRST?
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
Reroute when there is a WAN Outage.
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable

37. If the PSTN is presenting on channel 1 - should you configure CUCM to search 'top down' or 'bottom up'?
Bottom up - to prevent glare.
Top Down means that channel 1 will be the first channel used to place outgoing calls.
#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
(config)#voice register dialplan

38. Does CUCM support RSVP natively?
(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
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
Mobile Voice Access
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!

39. What would force you to use telephony-service to configure SRST?
voice translation-profile|and|voice translation-rule
When they are explicitly matched in a destination-pattern in a dial-peer.
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup

40. When a device is roaming to a different site How does it get the Roaming Sensitive Settings from the Device Pool?
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
Assign SIP Dial Rules
Call Simulator. You can use to validate path from router to the PSTN.
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.

41. Name 2 commands to verify RSVP functionality.
Reroute when there is a WAN Outage.
Top Down means that channel 1 will be the first channel used to place outgoing calls.
Sh ip rsvp reservation||sh sccp connections
Sh ccm-manager

42. On an MGCP GW - how could you see the primary and backup CUCM servers?
Show ccm-manager
'Use before the ... so XXXX
#after-hours block pattern
Sends the Calling Name.

43. How do you setup AutoRegistration in CUCM?
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Put them in a route list.
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie

44. 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
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.
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1

45. 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)
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
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
Debug isdn q931

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

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47. How do you configure SIP phones to be able to call other SIP phones via SIP URI?
(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
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 .)
SIP Route Pattern over a SIP Trunk.
Need to Know||Anytime you have an external call - it needs to match on a route pattern.

48. How do you see multicast packets being sent?
Debug ephone moh
#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
Call forwarding between voip to voip (when CUBE is in play)
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP

49. If you have an H323 Gateway at a siet where the phones are controlled by CUCM - what do you need from a dial-peer perspective?
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.
Phone number followed by domain name.|i.e. 3006@ipxcme.com
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.

50. How do you prevent toll fraud on CUCM?
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
Service Parameters --> Mobile Voice Access Number
Mobile Connect
(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

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CCIE Voice Test

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