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Post under tag sip
Most voted questions under tag sip
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+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
0
answers
What is the information SDP contents ?
posted
Nov 25, 2013
by
anonymous
voip
sip
h.248
+6
votes
1
answer
What are the messages or commands SIP uses?
posted
Nov 25, 2013
by
anonymous
sip
voip
+6
votes
1
answer
Usage of SS7, H.323 and SIP in VOIP network ?
posted
Nov 23, 2013
by
anonymous
h.248
voip
sip
ss7
+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
+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
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
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
+3
votes
1
answer
IMS : Why P-CSCF node can not send message directly to S-CSCF ?
posted
Oct 29, 2015
by
Alok
lte
volte
sip
+3
votes
0
answers
Registration Failed showing in case of Implementing SipDemo??
posted
Sep 20, 2014
by
সেতু বসাক
android
sip
+3
votes
1
answer
IMS: Does the PGW has static configuration of P-CSCF or dynamic ?
posted
Jun 11, 2014
by
Vimal Kumar Mishra
lte
cscf
sip
volte
pgw
+3
votes
1
answer
How the Forking flow goes in the Network?
posted
May 23, 2014
by
Sandeep Otari
lte
sip
+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
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: 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
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
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
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
+1
vote
0
answers
What if the Caller doesn't receive the SIP_PRACK/OK message from receiver ?
posted
Mar 13, 2020
by
Ankit Mishra
lte
ue
5g
sip
+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
1
answer
LTE: Is it necessary to establish bearer with QCI "5" to support transmission of SIP signalling messages ?
posted
Apr 13, 2018
by
Harshita
lte
ims
sip
interview questions
ue
+1
vote
1
answer
VOLTE: Location information in S8HR
posted
Sep 12, 2017
by
Michael Semama
volte
ims
ue
sip
lte
+1
vote
1
answer
Why Packet error loss rate is allowed more for conversational voice in QCI table?
posted
Aug 18, 2017
by
Rohit Verma
lte
volte
sip
ims
+1
vote
0
answers
What is the use of flow label field in SIP header?
posted
Aug 17, 2017
by
Rohit Verma
lte
sip
ims
+1
vote
0
answers
When i make whatsapp call or IMO call will it go via SIP protocol or different protocol?
posted
Aug 17, 2017
by
Rohit Verma
lte
ue
sip
ims
enodeb
+1
vote
1
answer
SIP/IMS layer is application layer or LTE protocol layer?
posted
Aug 16, 2017
by
Rohit Verma
lte
ims
sip
ue
+1
vote
0
answers
how to check the P-CSCF that is configured in the UE
posted
Jun 20, 2017
by
anonymous
lte
volte
ue
sip
cscf
+1
vote
0
answers
PSI of the SC of the SM-over-IP sender. What is PSI and SC here?
posted
Apr 9, 2017
by
Sneha Maganahalli
ims
sip
+1
vote
1
answer
QCI 5 is mandatory for IMS SIP Signalling?
posted
Apr 3, 2017
by
Anand Yadav
lte
ims
volte
sip
qci
+1
vote
0
answers
Interworking of UMTS/GSM with VoLTE?
posted
Apr 1, 2017
by
Anand Yadav
lte
gsm
umts
ue
sip
+1
vote
0
answers
MT Call from 2G/3G to VoLTE User
posted
Apr 1, 2017
by
Anand Yadav
lte
ims
volte
ue
sip
+1
vote
1
answer
SIP: What is the significance of presence of CSeq header filed in request message ?
posted
Aug 17, 2016
by
Ganesh
sip
ims
+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
sip
ims
voip
volte
interview questions
+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
sip
ims
interview questions
voip
+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
sip
ims
volte
voip
+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
lte
ims
volte
ue
sip
+1
vote
1
answer
IMS: When the following response codes are used during an established IMS call session ?
posted
Aug 1, 2016
by
Ganesh
ims
sip
ue
volte
lte
+1
vote
1
answer
From which layer of sip stack (transport layer, transaction layer or transaction user), sip messages get generated?
posted
Apr 3, 2016
by
anonymous
sip
+1
vote
0
answers
Please provide an ENUM protocol (RFC3761, RFC6116) wireshark capture
posted
Aug 31, 2015
by
Michael Semama
enum
sip
+1
vote
1
answer
Minimum set of required protocols for SIP calls?
posted
Sep 6, 2014
by
anonymous
sip
telecom
+1
vote
1
answer
What if during the Incoming Call Screening the originating UE identity is hidden?
posted
Jun 10, 2014
by
Kapil Kapoor
lte
sip
ims
+1
vote
0
answers
SIP: CSeq of BYE in transfer scenario?
posted
Jun 10, 2014
by
anonymous
sip
+1
vote
1
answer
LTE: Can someone please share SIP call flow through the lte network ?
posted
Mar 30, 2014
by
Vimal Kumar Mishra
sip
lte
ue
+1
vote
1
answer
SRTP master key determination is through configurations at the end points? or through SDP exchanges?
posted
Jul 16, 2013
by
Ashish Suchdev
srtp
sip
voip
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