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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.
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 set the inter-digit timeout for SIP phones in CME?
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
TRUE
(config)#voice register dialplan
Bandwidth

2. How do you prevent toll fraud on CUCM?
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
Debug isdn q931
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
When multiple sites use the same route pattern - do your digit manipulation on a route list.

3. How do you get around relying on DNS for your CUCMs?
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
(config)#sh cdp neigh detail
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

4. How do you support multiple codecs on a dialpeer?

Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
Apply voice-class codec
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify

5. With the gw-priority command - does higher or lower priority take precedence?
Configure it on the route group through the route list - then it will be local to the route list.
Higher
When multiple sites use the same route pattern - do your digit manipulation on a route list.
Allows you to transfer by only pressing the Transfer button once.

6. If you're using Called/Calling Party Transformations at the Route Pattern - what happens if you do Digit manipulation at the route list?
The Called/Calling Transformations are superceded.
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
Apply it to the ephone.
Outbound dial-peers

7. When a device is roaming to a different site How does it get the Roaming Sensitive Settings from the Device Pool?
Precede the # with a > ... so 9011*>#
#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
System Cisco Unified CM|Uncheck the box Auto-Reg Disabled||Enterprise Parameters --> Auto Registration Phone Protocol SIP or SCCP
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.

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

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9. How do you enable AAR system wide?
CUCM Service Parameters --> Automated Alternate Routing Enable --> True
(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
Dial-peers
(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

10. What are two caveats to using the ccm-manager config server</ip> command?
Phone number followed by domain name.|i.e. 3006@ipxcme.com
Call-manager-fallback or telephony-service mode SRST

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

11. What are the 3 mandatory commands within call-manager-fallback?
When they are explicitly matched in a destination-pattern in a dial-peer.
#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
1. Enable it.|2. Create AAR Group|3. Create CSS-AAR and apply at device level.|4. Apply AAR Group at line level.
Max-dn|max-ephone|ip source-address

12. 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.
Configure it on the route group through the route list - then it will be local to the route list.
On CUCM it's identical to adding an H323 GW.
'Use before the ... so XXXX

13. What is the bit rate for a G.729 call excluding layer 2?
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
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
8kb/s

14. How much bandwidth does a G.729 call including layer 3 require?
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
1 ... this is not optional!
24kb/s
voice translation-profile|and|voice translation-rule

15. How would you enable security on a GK?
Higher
Put them in a route list.
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow

16. On a gatekeeper trunk - how do you ensure the Sub is used as primary and Pub as backup?
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
In the CUCM 7.0.1 Release Notes ... search for restore.

17. When can you not use a Standard Local Route Group?
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
When configuring TEHO.
Proxy Line Mode has multiple icons on the phone.|Shared Line Mode has only one.

18. 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?
On CUCM it's identical to adding an H323 GW.
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)
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs

19. How do you create a trunk on the router side?
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
Telephony service|ip source-address 10.10.110.2|max-dn <NUM>|max-ephone <NUM>|create cnf-files
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
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

20. Where do you use VIA zone?
Gatekeeper| security acl answerarq 1||set up an access list permit whoever you want to allow
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
Put them in a route list.
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False

21. 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.
voice register pool|and|voice register dn
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie
Single Number Reach (Mobile Connect)

22. What are the commands to create the L3 routing interface for VLANS (SVI)?
...
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.

23. How do you configure SIP phones to be able to call other SIP phones via SIP URI?
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs
Automatically configures the MGCP GW for you.
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
SIP Route Pattern over a SIP Trunk.

24. What are the commands to configure a SIP phone in CUCME?
SIP Route Pattern over a SIP Trunk.
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit
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
Sends every digit to CUCM in real-time with digit-analysis being handled by CUCM.

25. How do you ensure no inter-digit timeout fro SIP phones within CUCM?
Configure it on the route group through the route list - then it will be local to the route list.
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
SIP Dial Rules
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.

26. How do you configure CUCM redundancy on an H323 gateway?
#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
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
Mobile Voice Access
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.

27. How do you create a trunk on the switch side?
Apply it to the ephone.
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
(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
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.

28. When it comes to H323 gateways - what should you always change - unless explicitly told not to?
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Sh ccm-manager

29. How do you prevent H323 caller-id updates to CUCM
Bottom up - to prevent glare.
#voice service voip| #no supplementary-service h225-notify cid-update
Precede the # with a > ... so 9011*>#
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

30. What are the commands to configure a MGCP Gateway? (router)
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
(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
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
(config)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify

31. When are digits stripped in a gateway?
When they are explicitly matched in a destination-pattern in a dial-peer.
Outbound dial-peers
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
...

32. In Gatekeeper CAC how do you restrict a specific endpoint?
CUCM OS Administration Settings --> NTP Servers
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones

33. Describe the relationship between route patterns and end devices.
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.
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.
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
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.

34. What is a best practice for digit manipulation - in regards to H323 GWs?
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
Higher
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.

35. How would you verify that DHCP is working in IOS?
Default is SRST||mode cme changes to CME|no mode cme changes back to SRST
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
'Service Parameters --> Auto Answer Timer
(config)#sh cdp neigh detail

36. By Nov. 16 - 2010||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
When multiple sites use the same route pattern - do your digit manipulation on a route list.
Device Pool Locations
...
Ccm-manager music-on-hold

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

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38. How do you place SCCP and SIP phones into a single huntgroup?
Call-manager-fallback or telephony-service mode SRST
Via the voice hunt-group parallel command
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 ....
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.

39. What command is needed on a gateway for it to invoke the DSP to convert multicast MOH stream to TDM?
Ccm-manager music-on-hold
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)
#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
Apply voice-class codec

40. Two useful troubleshooting commands for CUCME?
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
Master/Slave relationship. CUCM controls it.
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
sh ephone reg|and|debug voip dialpeer

41. How do you use an ephone template?
Apply it to the ephone.
Precede the # with a > ... so 9011*>#
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
When multiple sites use the same route pattern - do your digit manipulation on a route list.

42. A show isdn status shows TEI_ASSIGNED. What do you do to get MULTIPLE_FRAME_ESTABLISHED?
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.
Debug ephone moh
+ [CC 1-3 digits] [National Number max 15 minus CC digits]
Re-enter the mgcp bind control and mgcp bind media commands.

43. How do you block calls under call-manager-fallback?
#after-hours block pattern
TRUE
(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
Call-manager-fallback or telephony-service mode SRST

44. What is the Enable Enterprise Feature Access Service Parameter used for?
Dtmf-relay h245-alpha
The name configuration field in ephone-dn and voice register dn
Sends the Calling Name.
To enable two-stage dialing.

45. 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
Redundant dial plan. One on CUCM and one on the routers via dial-peers.
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
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.

46. What are the commands to configure SIP phones in CME?
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
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
(config)#sh cdp neigh detail
Debug isdn q931

47. When a CUCM device dials a number - what happens?
#test voice translation rule 1 <input to test>
'Use before the ... so XXXX
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 .)
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1

48. On an H323 GW - how do you adjust the timers for redundancy hunting?
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3
Top Down means that channel 1 will be the first channel used to place outgoing calls.
IP Voice Media Streaming App
Sends the Calling Name.

49. How do you configure a SIP Trunk? (router side)
(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
#test voice translation rule 1 <input to test>
Dial-peers
voice translation-profile|and|voice translation-rule

50. What's the difference between AAR and SRST?
TRUE
Single Number Reach (Mobile Connect)
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage
#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