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Most voted questions under tag ims

+6 votes
2 answers
LTE: How a LTE UE come to know whether LTE network supports IMS call or not ?
posted Jul 28, 2016 by Vikram Singh
  • lte
  • ims
  • enodeb
  • mme
+6 votes
2 answers
IMS: Why is IP sec tunnel established between UE and P-CSCF ?
posted Nov 25, 2015 by Alok
  • lte
  • volte
  • ims
  • sip
+6 votes
4 answers
VoLTE: Does a network need to establish a separate default bearer for IMS call ?
posted Oct 24, 2015 by Harshita
  • lte
  • ims
  • volte
+4 votes
1 answer
LTE: For the CS fall back what messages are exchanged between IMS, LTE and GSM nodes to continue VoLTE call ?
posted Aug 23, 2016 by Harshita
  • lte
  • volte
  • ims
  • ue
  • srvcc
+4 votes
2 answers
VoLTE: Why I-CSCF and S-CSCF has interface with the HSS and for what purposes it is used ?
posted Aug 5, 2016 by Ganesh
  • volte
  • lte
  • sip
  • ims
  • ue
+4 votes
0 answers
IMS : How does charging work in case of IMS based services ?
posted Dec 21, 2015 by Harshita
  • lte
  • charging
  • ims
+4 votes
0 answers
VoLTE Emergency EPC wireshark logs required
posted Dec 19, 2015 by Alkesh Mehta
  • lte
  • volte
  • ims
+4 votes
2 answers
Which node takes care of VoLTE charging ?
posted Oct 27, 2015 by Harshita
  • volte
  • ims
  • lte
+4 votes
1 answer
Is there any role of HSS while establishing voice call using IMS in lte network ?
posted Oct 11, 2014 by Harshita
  • lte
  • ims
+3 votes
1 answer
"Homogeneous Support of IMS Voice Over PS Sessions" in S6a ULR
posted Apr 23, 2018 by Michael Semama
  • lte
  • mme
  • volte
  • ims
  • ue
+3 votes
2 answers
LTE: How many types of charging scenarios come under the online charging system ?
posted Feb 25, 2017 by Vikram Singh
  • ims
  • charging
  • diameter
  • lte
  • interview questions
+3 votes
0 answers
Multiple IMS registration requests with nounce value
posted Feb 11, 2017 by Tejas Shinde
  • lte
  • ims
  • volte
  • ue
+3 votes
1 answer
what does it mean if SIP SUBSCRIBE Method includes event as "reg"?
posted Dec 25, 2016 by Vinay Kumar Tokala
  • sip
  • ims
+3 votes
0 answers
IMS: In what scenarios, an UE (IMS client) sends subscribe message to IMS server and when server notify UE ?
posted Jul 31, 2016 by Ganesh
  • ims
  • lte
  • ue
  • sip
+3 votes
1 answer
What is meant by NASS bundled authentication scheme, gprs ims bundled authentication scheme, sip digest auth scheme?
posted Jul 27, 2016 by Vakati Abilasn
  • lte
  • ims
+3 votes
1 answer
VOLTE: How the VoLTE call establishes for LTE network and legacy network ?
posted Jan 19, 2016 by Vikram Singh
  • volte
  • ims
  • lte
+3 votes
1 answer
How many types of application servers are defined by IMS architecture ?
posted Dec 6, 2015 by Neeraj Mishra
  • lte
  • ims
+3 votes
1 answer
LTE: Why does need a bearer of QCI 5 to exchange SIP signalling messages ?
posted Dec 4, 2015 by Ganesh Kumar
  • lte
  • ims
  • volte
  • sip
+3 votes
1 answer
LTE: What is the role of Media Resource Function (MRF) and Application Server (AS) while establishing VoLTE call ?
posted Dec 4, 2015 by Ganesh Kumar
  • lte
  • volte
  • ims
  • media server
+3 votes
2 answers
Is it necessary HSS and S-CSCF both the nodes belongs to home network for an IMS call ?
posted Nov 6, 2015 by Vimal Kumar Mishra
  • lte
  • volte
  • sip
  • ims
+2 votes
1 answer
IMS: How does S-CSCF locate PGW for a terminating VoLTE call ?
posted Jul 28, 2018 by Harshita
  • lte
  • ims
  • sip
+2 votes
2 answers
How ENB recognize incoming packet is voice packet or data packet?
posted Nov 10, 2017 by Rohit Verma
  • lte
  • ue
  • enodeb
  • ims
+2 votes
0 answers
How to decrease IMS/Volte call set up time?
posted Sep 5, 2017 by Shyam Singh Pal
  • lte
  • volte
  • ims
  • srvcc
  • interview questions
+2 votes
2 answers
What is SIP signalling in QCI table?Why it is needed in LTE?
posted May 22, 2017 by Dheerendra
  • lte
  • ims
  • sip
+2 votes
1 answer
What is the transport layer usually used for the SIP protocol in Volte (UDP/TCP/SCTP)?
posted Feb 27, 2017 by Michael Semama
  • sip
  • lte
  • ims
  • volte
+2 votes
0 answers
LTE: Which network element is configured to change the grace period of a call/subscription ?
posted Feb 25, 2017 by Vikram Singh
  • lte
  • telecom
  • ims
  • charging
  • policy
+2 votes
0 answers
LTE: How P-CSCF select S-CSCF to send SIP invite request receives from UE ?
posted Feb 25, 2017 by Vikram Singh
  • sip
  • lte
  • interview questions
  • ims
  • ue
+2 votes
0 answers
what are the Online Charging parameters for IMS calls (VoLTE)?
posted Feb 23, 2017 by Gurusamy Narayanaswamy
  • lte
  • volte
  • charging
  • ims
+2 votes
0 answers
What is the difference between user and subscription in IMS?
posted Feb 17, 2017 by Jim Tan
  • lte
  • ims
+2 votes
2 answers
LTE: Why a separate default bearer is required to exchange SIP signalling messages between UE and IMS network ?
posted Dec 20, 2016 by Vikram Singh
  • lte
  • volte
  • sip
  • ue
  • ims
+2 votes
1 answer
Can there be two trf uri in Feature-Cap header ?
posted Aug 18, 2016 by Vikas Upadhyay
  • lte
  • ims
  • sip
  • 3gpp
+2 votes
1 answer
IMS: How an LTE UE deregisters from the IMS network?
posted Aug 7, 2016 by Vikram Singh
  • lte
  • ims
  • ue
+2 votes
0 answers
VoLTE: At which stage of SIP registration, P-CSCF establishes secure IP connection with UE ?
posted Aug 5, 2016 by Ganesh
  • volte
  • lte
  • ims
  • sip
  • ue
+2 votes
0 answers
SIP: What is the functionality of ENUM node that residents in the SIP network ?
posted Aug 3, 2016 by Ganesh
  • sip
  • volte
  • ims
+2 votes
0 answers
Does UE provides authentication schemes(NBA,GBA) when sending IMS register request ?
posted Jul 29, 2016 by anonymous
  • lte
  • ims
+2 votes
0 answers
How VoLTE charging works?
posted Apr 8, 2016 by Chinmoy Padhi
  • volte
  • ims
  • charging
  • lte
  • diameter
+2 votes
1 answer
IMS: Function difference between MRFC and MRFP components of Media Resource Function ?
posted Dec 7, 2015 by Harshita
  • lte
  • ims
  • volte
  • media server
  • sip
+2 votes
1 answer
What are all identifiers used for an UE in IMS network ?
posted Nov 7, 2015 by Harshita
  • lte
  • volte
  • ims
  • sip
+2 votes
2 answers
Can someone share the call flow for SMS over LTE(IMS)?
posted Aug 20, 2015 by Sandeep Otari
  • lte
  • sms
  • ims
+2 votes
1 answer
LTE: Does IMS takes part in voice transmitting or is it omitted?
posted Jul 23, 2015 by anonymous
  • lte
  • ims
  • volte
+2 votes
1 answer
What's the purpose of these terms XML Document Management and XML Configuration Access Protocol ?
posted May 23, 2014 by Sandeep Otari
  • ims
  • lte
+2 votes
2 answers
Can someone please share a good link or good book to understand IMS stuff ?
posted Sep 19, 2013 by Ganesh Kumar
  • ims
+1 vote
0 answers
How does SMS call flow works in 5G?Is this same as SMS over IP or IMS?
posted Oct 15, 2020 by Akhilesh
  • lte
  • ue
  • ims
  • 5g
+1 vote
1 answer
What is SIP 500 internal Error means?
posted Mar 12, 2020 by Akhilesh
  • lte
  • sip
  • ims
+1 vote
1 answer
Can we establish VOLTE call in Scell?
posted Mar 5, 2020 by Himani
  • lte
  • ims
  • sip
  • volte
+1 vote
0 answers
volte call failed with Unknown NAS message
posted Mar 19, 2019 by Sivakumar.d
  • volte
  • lte
  • ims
  • epc
  • mme
+1 vote
1 answer
Does HO possible in emergency call?
posted Aug 30, 2018 by Jaganathan
  • lte
  • ue
  • nr
  • ims
  • 5g
+1 vote
0 answers
VoLTE in LBO: Number translation
posted May 22, 2018 by Michael Semama
  • lte
  • volte
  • ue
  • ims
  • epc
+1 vote
0 answers
SIP response 380 "Alternative service"
posted May 22, 2018 by Michael Semama
  • lte
  • volte
  • ue
  • ims
+1 vote
0 answers
IMS Mobile termanated call to CS network
posted May 2, 2018 by Michael Semama
  • lte
  • volte
  • ims
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