How many calls, inbound and outbound combined, are supported on the IP phone?

I don’t get it either – actualtests also says 50

number-of-channels—Number of channels available to accept incoming calls on the directory number. Remaining channels are reserved for outgoing calls and features, such as Call Transfer, Call Waiting, and Conferencing. Range: 1 to 50. Default: 0 (disabled).

….BUT, note that you can allow the line support up to 50 calls.

PSTN-RTR(config)#voice register dn 10
PSTN-RTR(config-register-dn)#number 3001
PSTN-RTR(config-register-dn)#huntstop channel ?
Channel number of dn call hunting stops at

50 Calls, By default voice register DN supports 50 calls

Wrote my 400-051 CCIE Collaboration exam few days ago, and passed with 920/1000 marks. The 400-051 exam is quite difficult, questions on Cisco Unified Communications Managers (CUCM) and Cisco IOS UC Applications and Features were not easy to answer, but other questions on Cisco Unified Contact Center Express (UCCX) and Cisco Unified IM Presence and Cisco Unity Connection were not difficult at all. I learned the premium passleader 400-051 dumps (here are vce and pdf: http://j.mp/1ZFQXjC), all new questions were same as my real test.

p.s. I found that some valid new questions here: https ://drive.google.com/open?id=0B-ob6L_QjGLpNnliRG04bG9GbEk (delete the space after “https” in case of 404 error)(FYI, all those questions were appeared in my real test).

Good Luck To You!

New 400-051 Exam Questions and Answers Updated Recently (12/July/2016):

NEW QUESTION 396
Refer to the exhibit. An engineer is trying to provision CUCME with three 8841 phones. However all phone fail to register. Which two changes in the configuration would allow the phones to register? (Choose two)
Image URL: examgod.com/plimages/0dfd9b84ebab_10FB9/400-051-dumps-3961_thumb.jpg

A. The registrar server command must be added under the voice register global configuration
B. The IP address trusted authenticate command must be added under voice service voip
C. The source-address command must be added under the voice register global configuration
D. The local SIP proxy address must be configuration under the sip-ua configuration
E. The registrar server command must be added under the sip section of voice service voip

Answer: CE

NEW QUESTION 397
A collaboration engineer has been asked to implement secure real-time protocol between a Cisco Unified CM and SIP gateway. Which option is a consideration for this implementation?

A. Only T.38 and Cisco fax protocol are supported
B. SIP require the all the time be sent in GMT
C. Call hold RE-INVITE is not supported
D. SRTP is supported only in cisco IOS 15.x and higher

Answer: B

NEW QUESTION 398
Refer to the exhibit. A collaboration engineer configures Cisco Unified CM location using G.711 and iLBC for each site. The bandwidth for each link is shown. Which two options represent the maximum concurrent number of calls supported from Grand Junction to Casper for each Codec? (Choose two)
Image URL: examgod.com/plimages/0dfd9b84ebab_10FB9/400-051-dumps-3981_thumb.jpg

A. 20 G.711 calls
B. 18 G.711 calls
C. 36 iLBC calls
D. 42 iLBC calls
E. 11 G.711 calls
F. 51 iLBC calls

Answer: CE

NEW QUESTION 399
A collaboration engineer is troubleshooting an MOH problem on a Cisco IOS SIP gateway. While searching through a debug ccsip message output, which three parameters in the SIP messages can be used to determine if the call was placed on hold? (Choose three)

A. OPTIONS WITH 301 CALLHOLD
B. INVITE WITH a=INACTIVE
C. INVITE WITH a=SENDONLY
D. OPTION WITH c=INACTIVE
E. c=IN IP4 0.0.0.0
F. BYE WITH A = CALLHOLD

Answer: BCE

NEW QUESTION 400
Refer to the exhibit. A cisco collaboration engineer discovers that an instance of IOS media termination point (MTP) could not maintain stable registration with CUCM. Call manager traces is showing in the exhibit. What is the reason for the flapping registration?
Image URL: examgod.com/plimages/0dfd9b84ebab_10FB9/400-051-dumps-4001_thumb.jpg

A. The CCM version on IOS configuration does not match the CUCM version.
B. The IOS MTP is experiencing high CPU and is missing its keep-alive.
C. A Firewall is blocking port 2000 intermittently between IOS Device and CUCM.
D. Another IOS Media device is attempting to register with the same name.

Answer: D

NEW QUESTION 401
A collaboration engineer is designing Cisco IM&P implementation to support instant messaging logging for compliance. Which two external databases can be used to support that functionality? (Choose two.)

A. Oracle database
B. MySQL database
C. Microsoft SQL database
D. PostgreSQL database
E. Informix SQL database

Answer: AD

NEW QUESTION 402
Refer to the exhibit. A cisco collaboration engineer is troubleshooting a gateway and gatekeeper problem and sees this output from a debug command. Which two configuration can cause this problem? (Choose two)
Image URL: examgod.com/plimages/0dfd9b84ebab_10FB9/400-051-dumps-4021_thumb.jpg

A. The same zone prefix is configured in two different gatekeepers
B. The same H323-ID is configured in two different gateways
C. The same gw-type-prefix is configured in two different zone subnets IDs
D. The same zone subnet ID is configured in two different gatekeepers
E. The same E164-ID is configured in two different gateways

Answer: BE

NEW QUESTION 403
The Cisco Unified Border Element is configured using high availability with the Hot Standby Routing Protocol. Which two pieces of information can be gathered about the calls traversing these border elements? (Choose two.)
Image URL: examgod.com/plimages/0dfd9b84ebab_10FB9/400-051-dumps-4031_thumb.jpg

A. The total number of calls is 150.
B. The number of non-native calls is 70.
C. The number of native calls is 50.
D. The number of calls preserved is 220.
E. The total number of active calls is 100.

Answer: AB

NEW QUESTION 404
Refer to the exhibit. Which two SIP packet handing behaviour will result with this cisco Unified Border Element (CUBE) configuration? (Choose two)
Image URL: examgod.com/plimages/0dfd9b84ebab_10FB9/400-051-dumps-4041_thumb.jpg

A. Unsupported content/MIME pass-through
B. SIP Refer is not support when received on this CUBE
C. Privacy headers received on SIP message will be replaced with NON-privacy headers on this CUBE
D. P-Preferred identities
E. Mid-call codec changes

Answer: AE

NEW QUESTION 405
A CUCM engineer has deployed Type B SIP Phones on a remote site and no SIP dial rules were deployed for these phones. How Will CUCM receive the DTMF after the phone goes off- hook and the button are pressed?

A. Each digit will be received by CUCM in a SIP NOTIFY message as soon as they are pressed.
B. The first digit will be received in a sip invite and subsequent digits will be received using NOTIFY message as soon as they are pressed.
C. Each digit bill be received by CUCM in a SIP INVITE as soon as the dial soft key has been pressed.
D. All digits will be received by CUCM in a SIP INVITE as soon as the dial soft key has been pressed.

Answer: A

NEW QUESTION 406
The Video engineer wants to enable the LATM codec to allow video endpoint to communicate over audio With other IP devices Which two Characteristic should the voice engineer be aware of before enabling LATM on the Cisco Unified border element router? (Choose two)

A. Dual tone Multi-frequency interworking with LATM codec is not supported
B. Codec transcoding between LATM and other codecs is not supported
C. SIP UPDATE message outlined in RFC3311 is not supported
D. Box-to-Box High availability support feature is not supported
E. Configure LATM under a voice class or dial peer is not supported
F. Basic calls using flow-around or flow-through is not supported

Answer: AB

NEW QUESTION 407
……

P.S. These New 400-051 Exam Questions Were Just Updated From The Real 400-051 Exam, You Can Get The Newest 400-051 Dumps In PDF And VCE From — http://j.mp/400-051-dumps-vce-pdf (454q)

Good Luck !!!

New 400-051 Exam Questions and Answers Updated Recently (6/Oct/2016):

NEW QUESTION 470
A collaboration engineer is troubleshooting an MOH problem on a Cisco IOS SIP gateway in searching through a debug CCSIP massage output. Which three parameters in the SIP massages can be used to determine if the call was placed on hold? (Choose three)

A. OPTIONS WITH 301 CALLHOLD
B. INVITE WITH a=INACTIVE
C. INVITE WITH a=SENDONLY
D. OPTION WITH c=INACTIVE
E. c=IN IP4 0.0.0.0
F. BYE WITH A = CALLHOLD

Answer: BCE

NEW QUESTION 471
Refer to the exhibit. Which Cisco IOS multipoint video conferencing profile is being configured?
Image URL: examgod.com/plimages/1182f0fc52a6_1196E/new-400-051-dumps-4711_thumb.jpg

A. guaranteed-video
B. guaranteed-audio
C. rendezvous
D. heterogeneous
E. guaranteed-video

Answer: D

NEW QUESTION 472
Refer to the exhibit. Which two SIP packet handling behavior will result with this CISCO Unified Border Element (CUBE) configuration? (Choose two)
Image URL: examgod.com/plimages/1182f0fc52a6_1196E/new-400-051-dumps-4721_thumb.jpg

A. Unsupported content/MIME pass-through
B. SIP Refer is not supported when received on this CUBE
C. Privacy headers received on SIP massage will be replaced with NON-privacy headers on this CUBE
D. P-Preferred identities
E. Mid-call codec changes

Answer: AE

NEW QUESTION 473
Multiple users report that when they try to login to Cisco Unified Communications Extension Mobility Manager this error is retrieved?
“Error:-[26] ?Busy, please try again”
Which description of the cause is true?

A. The intracluster Multiple Login Behaviour is set to Multiple Logins Not Allowed.
B. The Validate IP Address parameter is set to false, so the IP is not found in the trust list.
C. The number of concurrent log in and logout requests is higher than the Maximum Concurrent Requests service parameter.
D. the Extension Mobility Cache size has been lowered to 1000 and no more logins are allowed beyond this number.

Answer: C

NEW QUESTION 474
Assume 18 bytes for the Layer 2 header and a 10- millisecond voice payload, how much bandwidth should be allocated to strict priority queue for three VoIP calls that use a G 722 codec over an Ethernet network?

A. 331.2 kb/s
B. 261.6 kb/s
C. 238.4 kb/s
D. 347.8 kb/s
E. 274.7 kb/s

Answer: A

NEW QUESTION 475
What does a period accomplish when it is used in a SIP Dial Rule pattern that is associated with a Cisco 9971 IP Phone that is registered to Cisco Unified Communications Manager?

A. It manages any single digit from 0 to 9.
B. It manages any single digit from 0 to 9 or the asterisk (*) or pound (#) symbols.
C. It is a delimiter and has no significant dialling impact.
D. It manages one or more digits from 0 to 9 or the asterisk (*) or pound (#) symbols.
E. It manages one or more digits from 0 to 9.

Answer: B

NEW QUESTION 476
What does a weight represent in the enhanced location Call Admission Control mechanism on Cisco Unified Communications Manager?

A. It defines bandwidth that is available on a link.
B. It defines bandwidth that is available between locations.
C. It is the amount bandwidth allocation for different types of traffic.
D. It is used to provide relative priority of a location.
E. It is used to provide relative priority of a link between locations.

Answer: E

NEW QUESTION 477
Which three issues prevent a customer’s existing Jabber client from seeing the present status of a newly provisioned and registered Jabber client in its contact list? (Choose three.)

A. Owner user ID is not set on the newly provisioned client.
B. Incoming calling search space on SIP trunk to IM & P.
C. Primary DN is not set in end user configuration of the newly provisioned client.
D. Subscriber calling search space is not defined on newly provisioned client.
E. PC cannot resolve the FQDN of IM & P.
F. IM & P incoming ACL blocking inbound status.
G. Subscriber calling search space on SIP trunk to IM & P.

Answer: EFG

NEW QUESTION 478
Which two options are examples of data at rest? (Choose two.)

A. An email received from a colleague.
B. An email accessed via a web browser.
C. An email saved on a USB drive.
D. An email archived locally on a laptop hard drive.
E. An email sent to a colleague.

Answer: CD

NEW QUESTION 479
Which definition is included in a Cisco UC on UCS TRC?

A. Required RAID configuration, when the TRC uses external storage.
B. Configuration settings and patch recommendations for VMware software.
C. Configuration of virtual – to – physical network interface mapping.
D. Design and installation of blade server chassis and switching.
E. Server model and local components (CPU, RAM, Adapters, Local Storage) at the orderable part number level.

Answer: E

NEW QUESTION 480
Which three basic elements does the architecture for voice and video over WLAN include? (Choose three.)

A. Wireless LAN controllers
B. Wireless access points
C. Wireless bridge
D. Wireless VLAN
E. Wired call elements
F. DHCP server

Answer: ABE

NEW QUESTION 481
……

P.S. These New 400-051 Exam Questions Were Just Updated From The Real 400-051 Exam, You Can Get The Newest 400-051 Dumps In PDF And VCE From — http://j.mp/400-051-dumps-vce-pdf (532q)

Good Luck !!!

any update….