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CCIE Voice Test

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Answer 50 questions in 15 minutes.
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1. When it comes to H323 gateways - what should you always change - unless explicitly told not to?
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 ....
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
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones

2. What's the best way to perform digit manipulation on a route group?
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
(config)#voice register dialplan
Configure it on the route group through the route list - then it will be local to the route list.
...

3. How can you confirm the MGCP GW is registered to CUCM - in IOS?

Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name
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)
Sh ccm-manager

4. 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
Service Parameters --> Mobile Voice Access Number
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary

5. What are the commands to configure SIP phones in CME?
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
'Use before the ... so XXXX
Ssh to the CUCM the phone is registered to|show perf query class 'Cisco MOH Device'
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

6. How do you prevent toll fraud on CME?
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 ....
In the CUCM 7.0.1 Release Notes ... search for restore.
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
h225 timeout tcp establish 3 within a h323 voice class||#voice class h323 1|#h225 timeout tcp establish 3

7. 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
'Service Parameters --> Auto Answer Timer
#show call active brief|#show voice call summary|#show voice call status|show dialpeer voice summary

8. When can you not use a Standard Local Route Group?
Apply it to the ephone.
When configuring TEHO.
RP affects the display on the calling phone.||RL affects What is sent to the gateway (called number).
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie

9. What does ccm-manager config server [IP]</ip> do?
SERVICE PARAMETER>|| Stop routing on unallocated number flag - Set to False|| Stop routing user busy - Set to False
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
Automatically configures the MGCP GW for you.
Dial-peers

10. What are the commands to ensure an H323 GW always uses the Sub as primary and Pub as a backup?
#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
In milliseconds ... allows you to hang up cell phone then pick up at the desk phone without disconnecting the call.
#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
Debug ephone moh

11. Privacy is enabled system-wide in CUCM by default. (T or F)
#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
At the Line or Device level. -- Sometimes unpredictable performance of assigned to the device though.
TRUE
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

12. Where do you use VIA zone?
To enable two-stage dialing.
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
SIP Dial Rules
System --> Phone NTP Reference|Then Apply to System --> Date/Time Group

13. What types of digit manipulation can you perform at the route pattern?
Outbound dial-peers
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.
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!
Enable MOH on the CME.||#telephony service|#moh music-on-hold.au

14. What does Display-IE do?
Allows you to transfer by only pressing the Transfer button once.
#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
Sends the Calling Name.
Dial-peers

15. When you make a call and it results in a secondary dial-tone - What is this a symptom of?
When multiple sites use the same route pattern - do your digit manipulation on a route list.
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
No POTS dial-peer or no direct-inward-dial on a pots dial-peer

16. Where is it best to manipulate digits for inbound calls?

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17. When do you do digit manipulation at the route pattern as opposed to the route list?
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
Dtmf-relay h245-alpha
When multiple sites use the same route pattern - do your digit manipulation on a route list.

18. How do you ensure no inter-digit timeout fro SIP phones within CUCM?
(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
Call forwarding between voip to voip (when CUBE is in play)
SIP Dial Rules
Apply it to the ephone.

19. When setting up SIP URI where do you configure the CUCM's domain name?'
Push as much digit manipulation to the router as possible - so you can re-use it for SRST.
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name
Automatically configures the MGCP GW for you.
TRUE

20. How do you get around relying on DNS for your CUCMs?
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)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
Put them in a route list.
Use IPs instead of hostnames for all CUCM servers.|ENTERPRISE PARAMETERS --> Replace all CUCM hostnames with IPs in URLs

21. What CUCM services should you activate?
Call forwarding between voip to voip (when CUBE is in play)
Auto Call Pickup Enabled
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
AAR -- Used for WAN Congestion|SRST -- Used for WAN Outage

22. '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
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.
Sh ip rsvp reservation||sh sccp connections
Proxy Line Mode has multiple icons on the phone.|Shared Line Mode has only one.
...

23. What are the commands to configure NTP in IOS?
Auto Call Pickup Enabled
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)#clock timezone|(config)#ntp server/master|(config)#sh ntp status to verify
The name configuration field in ephone-dn and voice register dn

24. What are the commands to configure SRST in fallback?
You may be running into a CSA bug. Disable CSA in CUCM by:|SSH to CUCM|utils csa disable
Access Port Method||interface range fa0/1 - 3|switchport voice vlan 20|switchport access vlan 10|spanning-tree portfast
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)
#call-manager-fallback|#ip source-address (IP)|#max-ephone 4|max-dn 8|Configure a refernce in CUCM

25. What is the bit rate for a G.729 call excluding layer 2?
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
8kb/s
1st the Subnet is recognized. (Device Mobility Info)|Then different Physical Locations are compared.
Uncheck it! Otherwise both H323 devices on either end wait for the other to send TCS first - and the connection will timeout.

26. What is call-forward pattern used for?
CM SERVICEABILITY TOOL --> SERVICE ACTIVATION --> Check all - then uncheck CMI and Security Services and activate.
SIP Route Pattern over a SIP Trunk.
Call forwarding between voip to voip (when CUBE is in play)
Sends the Calling Name.

27. 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
When they are explicitly matched in a destination-pattern in a dial-peer.
Telephony-service|no auto-reg-ephone|max-ephones <NUM>|max-dn <NUM> no-reg|ip source-address <IP> port 2000|create cnf-files
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.

28. What command is needed on a gateway for it to invoke the DSP to convert multicast MOH stream to TDM?
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
#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
Ccm-manager music-on-hold
Enterprise Parameters --> Organization Top Level Domain|Enterprise Parameters --> Cluster Fully Qualified Domain Name

29. How do you configure class of service (CoS) in CUCM? CME?
At the CLI: utils ntp status
#test voice translation rule 1 <input to test>
CUCM - Partitions and Calling Search Spaces||CME - COR Lists
#after-hours block pattern

30. What does an H323 GW require that MGCP GWs do not?
Dial-peers
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
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
Apply it to the ephone.

31. When are digits stripped in a gateway?
#voice service voip| #no supplementary-service h225-notify cid-update
When they are explicitly matched in a destination-pattern in a dial-peer.
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 ....
Assign a logout-profile to the ephone.

32. 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?
When I call in from off-net to a DID number in-net ... once authenticated - your calls appear to come from the desk phone.
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).
1 ... this is not optional!

33. How do you place SCCP and SIP phones into a single huntgroup?
(config)#sh cdp neigh detail
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 ....
Via the voice hunt-group parallel command
(config)#voice register dialplan

34. When using drop-through-option What is the max number of huntgroups?
CUCM Service Parameters --> Call Park Reversion Timer
sh ephone reg|and|debug voip dialpeer
1 ... this is not optional!
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie

35. How do you verify that NTP is working on the CUCM server?
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
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
At the CLI: utils ntp status
DDI - Digit Discard Instruction (PreDot)||Mask - most powerful (does DDI and Prefix)||Prefix - Prefixes digits|| **These three types are compounded in this order!

36. On the RDP What is the CSS used for?
Dial-peers
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
Mobile Voice Access

37. In Gatekeeper CAC how do you restrict a specific endpoint?
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
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
Debug ephone moh
#voice-class h323 1|#h225 timeout tcp establish 3 (if no response within 3 seconds continue dial-peer hunting)

38. What's the best way to do digit manipulation on an IOS gateway?

SIP Route Pattern over a SIP Trunk.
Sends the Calling Name.
voice translation-profile|and|voice translation-rule

39. What does the Transfer On-hook Enabled Service Parameter do?
Allows you to transfer by only pressing the Transfer button once.
#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
Apply voice-class codec
Assign SIP Dial Rules

40. Is the order of the MRGs in an MRGL significant?
Yes. The media resources in the first MRG listed will be used before media resources in the second MGR listed.
8kb/s
Ccm-manager music-on-hold
Service Parameter --> Block OffNet To OffNet Transfer --> True

41. What are the 3 mandatory commands within call-manager-fallback?
Dial-peers
Higher
Max-dn|max-ephone|ip source-address
(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie

42. How do you block calls under call-manager-fallback?
Gatekeeper|endpoint resource-threshold|endpoint max-calls h323id gk-trunk_2 1||The bandwidth command only allows restriction between zones
In the CUCM 7.0.1 Release Notes ... search for restore.
#after-hours block pattern
At the CLI: utils ntp status

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

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44. Does CUCM support RSVP natively?
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.
Device Settings --> Softkey Template|Copy a template and make your changes.|Then apply to the device.
Higher
To notify SIP Phones of NTP

45. How do you prevent toll fraud on CUCM?
Configure it on the route group through the route list - then it will be local to the route list.
SERVICE PARAMETER>|| Block Offnet to Offnet Transfer - Set to True
Show ccm-manager
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

46. How do you allow the Calling Name to be sent to the PSTN on a router?
Max-dn|max-ephone|ip source-address
...

(config)#int s0/0/0:15 (this is created after you setup the PRI)|(config-if)#isdn outgoing display-ie

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

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48. 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.
Reroute when there is a WAN Outage.
'Service Parameters --> Auto Answer Timer

49. What are the commands to create vlans on an ESW?
When configuring TEHO.
Vlan database|vlan 130 name DATA|vlan 240 name PHONES|apply|exit
Gw-priority command||#gatekeeper| #zone prefix CUCM 2... gw-priority 10 US_Trunk_2| #zone prefix CUCM 2... gw-priority 5 US_Trunk_1
No it invokes the RSVP call agent on the IOS Router via SCCP message. i.e. use a Software MTP.

50. What terminology translates to AAR?
CAT IOS|switchport trunk encap dot1q|switchport mode trunk|switchport trunk native vlan 10 --> !!!DATA VLAN!!!
Reroute when here is WAN congestion.
#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 it to the ephone.

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CCIE Voice Test

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