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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 see the details of calls coming in and out of the PRI?
In CUCM - configure CFUR to point to it's E164 number.
#after-hours block pattern
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
Debug isdn q931

2. How do you configure CUCM redundancy on an H323 gateway?
Apply voice-class codec
#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
Master/Slave relationship. CUCM controls it.
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 .)

3. When using GK redundancy - what must you do to ensure both SUB and PUB use port 1720 for call-signalling.

4. How do you prevent toll fraud on CME?
voice register pool|and|voice register dn
Sh ip rsvp reservation||sh sccp connections
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
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 ....

5. Does CUCM support RSVP natively?
Put them in a route list.
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
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
Mobile Voice Access

6. When a CUCM device dials a number - what happens?
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 .)
Call forwarding between voip to voip (when CUBE is in play)
Outbound dial-peers
Automatically configures the MGCP GW for you.

7. How do you create a trunk on the router side?
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
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
...
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

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

9. How do you configure a gateway to register with gatekeeper?
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.
#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
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.
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.

10. When it comes to H323 gateways - what should you always change - unless explicitly told not to?
(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>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Service Parameters --> Mobile Voice Access Number
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary

11. How much bandwidth does a G.729 call including layer 3 require?
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
Sh ip rsvp reservation||sh sccp connections
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
24kb/s

12. What's the best way to do digit manipulation on an IOS gateway?
voice translation-profile|and|voice translation-rule
Bottom up - to prevent glare.
SIP Route Pattern over a SIP Trunk.
(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

13. How do you configure SIP phones to be able to call other SIP phones via SIP URI?
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
SIP Route Pattern over a SIP Trunk.
...
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.

14. When are digits stripped in a gateway?
When configuring TEHO.
(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
When they are explicitly matched in a destination-pattern in a dial-peer.
Call-manager-fallback or telephony-service mode SRST

15. What are the commands to configure NTP in IOS?
...
(config)#sh cdp neigh detail
Matches any length dialed number and truncates it to 4 digits.
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify

16. When can you not use a Standard Local Route Group?
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
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 ....
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM
When configuring TEHO.

17. When you make a call and it results in a secondary dial-tone - What is this a symptom of?
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323
Dtmf-relay h245-alpha
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)

18. How do you enable Extension Mobility for a device in CME?
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
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
Assign a logout-profile to the ephone.
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast

19. How do you set the inter-digit timeout for SIP phones in CME?
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
When configuring TEHO.
Reroute when there is a WAN Outage.
(config)#voice register dialplan

20. What commands are needed to configure the voice register pool in CME?
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
To notify SIP Phones of NTP
#voice service voip| #no supplementary-service h225-notify cid-update
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

21. An MGCP gateway serving as an SRST router requires what?
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name
Ccm-manager music-on-hold
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

22. What are the basic ephone-dn and ephone commands?
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
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
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit
CUCM Service Parameters --> Automated Alternate Routing Enable --> True

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

24. How do you see multicast packets being sent?
Debug ephone moh
Precede the # with a > ... so 9011*>#
...
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3

25. On an H323 GW - how do you adjust the timers for redundancy hunting?
IP Voice Media Streaming App
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
Call Simulator. You can use to validate path from router to the PSTN.

26. What does an H323 GW require that MGCP GWs do not?
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
Re-enter the mgcp bind control and mgcp bind media commands.
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup

27. What terminology translates to SRST?
Reroute when there is a WAN Outage.
Precede the # with a > ... so 9011*>#
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
8kb/s

28. How do you enable AAR?
SERVICE PARAMETER> Automated Alternate Routing Enable > True
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary
In CUCM on the PRI interface of the MGCP Gateway - set the Significant Digits to 4.
You need dial-peers and to allow h323 to h323 communication.||voice service voip| allow-connections h323 to h323

29. On the RDP What is the CSS used for?

Mobile Voice Access
(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
Single Number Reach (Mobile Connect)

30. 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?
Debug ephone moh
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Service Parameters --> Mobile Voice Access Number
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)

31. What are the commands to create the L3 routing interface for VLANS (SVI)?
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
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
At the CLI: utils ntp status
CUCM OS Administration Settings --> NTP Servers

32. What are the steps to integrate CUPS with CUCM?
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
Call-manager-fallback or telephony-service mode SRST
To enable two-stage dialing.
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

33. What does the Transfer On-hook Enabled Service Parameter do?
1. Complicated Hunt Group|2. Need to support Calling Name|3. Need to support Call Park Call Pickup
Precede the # with a > ... so 9011*>#
To enable two-stage dialing.
Allows you to transfer by only pressing the Transfer button once.

34. What do you need to do to activate the CME GUI?
Dial-peers
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
Apply it to the ephone.
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.

35. Where do you use VIA zone?
No POTS dial-peer or no direct-inward-dial on a pots dial-peer
It's best to strip digits at the voice port.
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
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 get around relying on DNS for your CUCMs?
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
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
sh ephone reg|and|debug voip dialpeer
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.

37. How do you support multiple codecs on a dialpeer?
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 .)
Service Parameters --> Mobile Voice Access Number
Apply voice-class codec
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable

38. How do you use the # as a string terminator within a SIP Dial Rule?
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name
Matches any length dialed number and truncates it to 4 digits.
It's best to strip digits at the voice port.
Precede the # with a > ... so 9011*>#

39. How do you prevent H323 caller-id updates to CUCM
In the CUCM 7.0.1 Release Notes ... search for restore.
#voice service voip| #no supplementary-service h225-notify cid-update
Translate called - Calls going out to the PSTN||Translate Calling - Use on calls coming in from the PSTN. To change the ANI (Caller ID)
Precede the # with a > ... so 9011*>#

40. Where can you assign the AAR Group?
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.
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
(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

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

42. How do you test a Voice Translation Rule?
#test voice translation rule 1 <input to test>
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!

43. What are the commands to configure a T1/E1 PRI?
...
CUCM Service Parameters --> Automated Alternate Routing Enable --> True
(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
Dial-peers

44. How do you verify that NTP is working on the CUCM server?
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
Phone number followed by domain name.|i.e. 3006@ipxcme.com
SERVICE PARAMETER> Automated Alternate Routing Enable > True
At the CLI: utils ntp status

45. What is call-forward pattern 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:(SUB IP)| #dtmf-relay h245-alpha||#dial-peer voice 30001 voip| #destination-pattern 3...| #voice-clas
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
Device Pool Locations
Call forwarding between voip to voip (when CUBE is in play)

46. When using drop-through-option What is the max number of huntgroups?
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
1 ... this is not optional!
When they are explicitly matched in a destination-pattern in a dial-peer.
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

47. What are the commands to configure an H323 GW?
(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
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
#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
Single Number Reach (Mobile Connect)

48. What are the commands to ensure an H323 GW always uses the Sub as primary and Pub as a backup?
Call-manager-fallback or telephony-service mode 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
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
#voice service voip| #no supplementary-service h225-notify cid-update

49. What should you configure before entering auto qos?
Bandwidth
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
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
CUCM Service Parameters --> Call Park Reversion Timer

50. What does ccm-manager config server [IP]</ip> do?
'Service Parameters --> Auto Answer Timer
Automatically configures the MGCP GW for you.
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
Ccm-manager music-on-hold