Recent posts under tag 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

+1 vote

1 answer

How to decide which attach type shall use when UE set “IMS PS Voice preferred and CS Voice as secondary”?

posted Dec 16, 2016 by Jim Tan

+1 vote

0 answers

Hi what are the customer facing KPI for 3G and LTE ? Means how to check the customer experience for 3G and 4G users ?

posted Sep 21, 2016 by Dipanshu Kulshrestha

+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

+2 votes

1 answer

Can there be two trf uri in Feature-Cap header ?

posted Aug 18, 2016 by Vikas Upadhyay

0 votes

1 answer

SIP: When does proxy server initiate authentication/authorization for the received INVITE request ?

posted Aug 18, 2016 by Neelam

+1 vote

1 answer

SIP: What is the significance of presence of CSeq header filed in request message ?

posted Aug 17, 2016 by Ganesh

0 votes

1 answer

function and differences between record route header and route header in SIP

posted Aug 15, 2016 by anonymous

+1 vote

2 answers

SIP: Does all the SIP control messages passes through SIP proxy-server or only a subset of SIP messages?

posted Aug 14, 2016 by Vikram Singh

+1 vote

1 answer

SIP: In what cases or scenarios, an user agent can send INVITE within an already established Dialog between UAC and UAS?

posted Aug 14, 2016 by Vikram Singh

+1 vote

2 answers

SIP: Why does proxy server respond with 100 trying message ? What if it does not do this ?

posted Aug 14, 2016 by Vikram Singh

+1 vote

0 answers

LTE to EHRPD call flow: Can anyone provide me information regarding call process from LTE to EHRPD?

posted Aug 9, 2016 by Arijit Chakraborty

+2 votes

1 answer

IMS: How an LTE UE deregisters from the IMS network?

posted Aug 7, 2016 by Vikram Singh

+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

+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

+1 vote

1 answer

IMS: When a dedicated bearer is established for a VoLTE call and which node initiates it ?

posted Aug 5, 2016 by Ganesh

+2 votes

0 answers

SIP: What is the functionality of ENUM node that residents in the SIP network ?

posted Aug 3, 2016 by Ganesh

+1 vote

1 answer

IMS: When the following response codes are used during an established IMS call session ?

posted Aug 1, 2016 by Ganesh

+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

+2 votes

0 answers

Does UE provides authentication schemes(NBA,GBA) when sending IMS register request ?

posted Jul 29, 2016 by anonymous

+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

+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

+1 vote

0 answers

LTE: How does VoLTE work and what all signalling messages have been defined for this feature ?

posted Jun 17, 2016 by Harshita

+2 votes

0 answers

How VoLTE charging works?

posted Apr 8, 2016 by Chinmoy Padhi

+1 vote

1 answer

How will UE use MCC MNC values (p-access-network-info header) in LTE-IMS integration?

posted Feb 22, 2016 by anonymous

+3 votes

1 answer

VOLTE: How the VoLTE call establishes for LTE network and legacy network ?

posted Jan 19, 2016 by Vikram Singh

0 votes

0 answers

VoLTE : In what terms, voice call quality differ from 2G/3G to LTE ?

posted Jan 4, 2016 by Harshita

+4 votes

0 answers

IMS : How does charging work in case of IMS based services ?

posted Dec 21, 2015 by Harshita

+4 votes

0 answers

VoLTE Emergency EPC wireshark logs required

posted Dec 19, 2015 by Alkesh Mehta

+2 votes

1 answer

IMS: Function difference between MRFC and MRFP components of Media Resource Function ?

posted Dec 7, 2015 by Harshita

+3 votes

1 answer

How many types of application servers are defined by IMS architecture ?

posted Dec 6, 2015 by Neeraj Mishra

+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

+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

+6 votes

2 answers

IMS: Why is IP sec tunnel established between UE and P-CSCF ?

posted Nov 25, 2015 by Alok

+2 votes

1 answer

What are all identifiers used for an UE in IMS network ?

posted Nov 7, 2015 by Harshita

+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

+4 votes

2 answers

Which node takes care of VoLTE charging ?

posted Oct 27, 2015 by Harshita

+6 votes

4 answers

VoLTE: Does a network need to establish a separate default bearer for IMS call ?

posted Oct 24, 2015 by Harshita

+1 vote

0 answers

Mobile is sending the SIP Registration request and the N/w responds with the "405 Method not involved"

posted Sep 2, 2015 by Pdk

+2 votes

2 answers

Can someone share the call flow for SMS over LTE(IMS)?

posted Aug 20, 2015 by Sandeep Otari

+2 votes

1 answer

LTE: Does IMS takes part in voice transmitting or is it omitted?

posted Jul 23, 2015 by anonymous

0 votes

2 answers

Do we need a default bearer for IMS registration?

posted Jun 17, 2015 by anonymous

+1 vote

0 answers

What is speech path in case "UE 4G - UE 4G" call in the same network?

posted Jun 16, 2015 by anonymous

+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

+2 votes

Overview of Single Radio Voice Call Continuity(SRVCC) Technology

posted Jun 19, 2014 by Kapil Kapoor

+2 votes

EMC corporation is hiring Senior Software Engineers

posted Jun 19, 2014 by anonymous

+1 vote

1 answer

What if during the Incoming Call Screening the originating UE identity is hidden?

posted Jun 10, 2014 by Kapil Kapoor

0 votes

1 answer

Please suggest me a open source tas for IMS

posted Jun 6, 2014 by Alok

+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

+2 votes

Explained Emergency Calls in LTE network.

posted May 7, 2014 by Mridul