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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 configure AAR?
IP Voice Media Streaming App
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.

2. How do you get around relying on DNS for your CUCMs?
Assign SIP Dial Rules
Call forwarding between voip to voip (when CUBE is in play)
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
(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

3. 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
Ccm-manager music-on-hold
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
(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

4. When do you do digit manipulation at the route pattern as opposed to the route list?
Bandwidth
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
When multiple sites use the same route pattern - do your digit manipulation on a route list.
Top Down means that channel 1 will be the first channel used to place outgoing calls.

5. In CUCME what SIP config command is equivalent to ephone and ephone-dn?
SIP Route Pattern over a SIP Trunk.
To notify SIP Phones of NTP
It's best to strip digits at the voice port.
voice register pool|and|voice register dn

6. What is the full E164 format?
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
(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

7. Two useful troubleshooting commands for CUCME?
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
Apply voice-class codec
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
sh ephone reg|and|debug voip dialpeer

8. What are the 3 mandatory commands within call-manager-fallback?
Max-dn|max-ephone|ip source-address
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
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 ....
#voice service voip| #no supplementary-service h225-notify cid-update

9. How do you disable KPML?
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
In the CUCM 7.0.1 Release Notes ... search for restore.
Region setting alone is not enough. You must set:|Enterprise Parameters --> Advertise G.722 Codec Disable
Assign SIP Dial Rules

10. How much bandwidth does a G.729 call including layer 3 require?
#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

24kb/s
Apply it to the ephone.

11. On an MGCP GW - how could you see the primary and backup CUCM servers?
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
Show ccm-manager
Call-manager-fallback or telephony-service mode SRST

12. What is Mobile Voice Access?
In CUCM - configure CFUR to point to it's E164 number.
Allows you to transfer by only pressing the Transfer button once.
CUCM Service Parameters --> Automated Alternate Routing Enable --> 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.

13. How do you configure phone ports on a 3750?
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.
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
Debug ephone moh

14. On a gatekeeper trunk - how do you ensure the Sub is used as primary and Pub as backup?
Sends the Calling Name.
TRUE
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
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1

15. With the gw-priority command - does higher or lower priority take precedence?
Higher
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
Reroute when here is WAN congestion.

16. On the RDP What is the Rerouting CSS used for?
#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
#voice service voip| #no supplementary-service h225-notify cid-update
Single Number Reach (Mobile Connect)
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 ....

17. What are the commands to create the L3 routing interface for VLANS (SVI)?
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 Route Pattern over a SIP Trunk.
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
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.

18. What must you do for a BACD script to work on a CME router?
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
Phone number followed by domain name.|i.e. 3006@ipxcme.com
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au

19. 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?
Sh ccm-manager
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
When configuring TEHO.
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.

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

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21. How do you block calls under call-manager-fallback?
CUCM Service Parameters --> Call Park Reversion Timer
#after-hours block pattern
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
Precede the # with a > ... so 9011*>#

22. When using drop-through-option What is the max number of huntgroups?
(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
1 ... this is not optional!
Allows you to transfer by only pressing the Transfer button once.
To notify SIP Phones of NTP

23. 'If you're not getting a DHCP address from CUCM what then?
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
At the CLI: utils ntp status

24. What are the basic SCCP Commands fro telephony-service in CUCME?
When configuring TEHO.
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
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.

25. 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?
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
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)
Bandwidth
Sh ccm-manager

26. What commands are needed to configure the voice register pool 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
Call-manager-fallback or telephony-service mode SRST
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
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

27. What's the difference between AAR and SRST?
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
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 ....
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage

28. Is the + character supported on a VOIP dial-peer?

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29. On an MGCP GW - if you select Top Down under Channel Selection Order - What does that mean?
Higher
voice register pool|and|voice register dn
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
Top Down means that channel 1 will be the first channel used to place outgoing calls.

30. Name 4 useful show commands for active calls.
Debug isdn q931
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
(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
sh ephone reg|and|debug voip dialpeer

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

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32. A show isdn status shows TEI_ASSIGNED. What do you do to get MULTIPLE_FRAME_ESTABLISHED?
To enable two-stage dialing.
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Device Pool Locations
Re-enter the mgcp bind control and mgcp bind media commands.

33. How do you see the details of calls coming in and out of the PRI?
Debug isdn q931
1 ... this is not optional!
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
Sh ip rsvp reservation||sh sccp connections

34. What types of digit manipulation can you perform at the route pattern?

Assign a logout-profile to the ephone.
Device Pool Locations
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!

35. How do you configure phone ports on an ESW?
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
(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
Phone number followed by domain name.|i.e. 3006@ipxcme.com
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

36. How do you prevent H323 caller-id updates to CUCM
...
Sends the Calling Name.
#voice service voip| #no supplementary-service h225-notify cid-update
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST

37. How do you place SCCP and SIP phones into a single huntgroup?
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
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
Via the voice hunt-group parallel command
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'

38. 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
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
(config)#voice register dialplan
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

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

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40. On an H323 GW - how do you adjust the timers for redundancy hunting?
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
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
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM

41. When do you use translate called? Translate calling?
Max-dn|max-ephone|ip source-address
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)
Configure it on the route group through the route list - then it will be local to the 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

42. What is the Enable Enterprise Feature Access Service Parameter used for?
SERVICE PARAMETER> Automated Alternate Routing Enable > True
(config)#voice register dialplan
To enable two-stage dialing.
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au

43. How do you use the # as a string terminator within a SIP Dial Rule?
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
'Service Parameters --> Auto Answer Timer

Precede the # with a > ... so 9011*>#

44. What are the commands to configure NTP in IOS?
Sends the Calling Name.
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
CUCM Service Parameters --> Automated Alternate Routing Enable --> True
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.

45. What is the bit rate for a G.729 call excluding layer 2?
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 .)
8kb/s
To notify SIP Phones of NTP
When configuring TEHO.

46. How would you enable security on a GK?
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
CUCM OS Administration Settings --> NTP Servers
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
#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

47. 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?
voice register pool|and|voice register dn
Sh ccm-manager
...
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.

48. What are the commands to configure a T1/E1 PRI?
(config)#voice register dialplan
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)
sh ephone reg|and|debug voip dialpeer
(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

49. How do you allow the Calling Name to be sent to the PSTN on a router?
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie
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
Call forwarding between voip to voip (when CUBE is in play)
+ [CC 1-3 digits] [National Number max 15 minus CC digits]

50. When a device is roaming to a different site How does it get the Roaming Sensitive Settings from the Device Pool?
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
Reroute when here is WAN congestion.
To enable two-stage dialing.
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.