Drop calls on landline phone

I'm receiving more and more instances of drop calls on my home phone--both cordless and land line phone. Why?
I was told that with fios this wouldn't happen.

Your calls should not be dropping like that. You can reset the ONT box by using the following steps...
Unplug the electrical power cord of your Battery Backup Unit (BBU) from the wall outlet.
Open the battery cabinet on the BBU (you may need a screwdriver to do this).
Disconnect the batter leads and wait 3 min. Reconnect the battery leads.
Put the battery cabinet back on and then plug the power cord back into the wall
This reboots the fiber optic terminal where all your services come in. If you are still having troubles, please send me a private message.
Anthony_VZ
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Similar Messages

My phone keeps dropping calls. The phone reads call failed!

my phone keeps dropping calls. The phone reads call failed! (as this is how I find out where I am working each day. I am losing money Help!)

Settings > General > Reset > Reset Network Settings
If the issue persists, contact the carrier.

Why can't I receive calls from landline phones?

My phone was fine until yesterday. I decided to change my service to another provider and since then I can no longer receive phone calls from landlines to my phone. The phone service has not switched over yet and I still have verizon service and It's the same number, just going to be with a different provider. I can call out and receive calls from cell phones just not landlines, they just go to some voicemail thing. Is this a problem with verizon's service, the fact that the phone is in transition of providers or something else?
Solved!
Go to Solution.

Well, perhaps all the problems aren't gone, I have noise in the line now, and some people who call the line get a taped message, and leave messages on an "answering machine" that is not mine and that I cannot access in any way.
This is not new technology. Come on, Verizon. Why did this stuff work in 1975 and not now?

Dropping calls on i phone 6

Has any one else got this problem for the last 2 weeks i have had issues , when i call some one it tages ages to connect the call , then during the call it cuts out i cannot hear the person and they cannot hear me this happens constantly , then when i go to hang up the screen is frozen in the call for about 10 seconds , I tried resoring the phone from back up and then setting up the phone as new , i swapped my sim still the same problem in fact its worse now.
I have arranged for this to be sent to apple for repair , would they replace my phone instead i dont know if this is possible or if any one else has the same issue?

If found faulty then Apple would replace the unit
See this for actions before sending
What to do when you return or send your iPhone, iPad, or iPod touch in for service - Apple Support

Dropped calls on micro cell cell from weak tower signal

They all drop calls when the phone gets even the least amount of signal from a tower. This happens in South Carolina,Florida,New Jersey. So the problem is nation wide. This problem was identified back in 2010. Has there been a fix yet?

The "problem" is not nationwide otherwise myself and a lot others would be experiencing the same thing.
There are lots of reason why call may be dropped and the causes are varied. The MicroCell does not need a local tower (macrocell) to connect to when in range of the MicroCell. The macrocell is only required at the time of Initial Activation and then for periodic location verification during night time network maintenance ( which is only done ocassionally).
Certain phones (specifically the Samsung Galaxy line of phones) have difficulty with the MicroCell due to OS protocols which Samsung is aware of but very slow to respond.
If you are experiencing dropped calls you will need to give us specific details of your setup, ISP, phone, etc to see if we can help. Your issue may or may not be related to what you are calling a nationwide problem.

Droid 4 Constantly dropping calls

Has anyone else (who's had their Droid 4 for a year or more) had any problems with an increase in number of dropped calls as the phone is getting older? It's now happening to me daily, and it seems that they are now occurring more and more often. I have the extended warranty and insurance on my phone and am trying to decide if it's worth the hassle of filing a claim on one or the other. I very rarely get a "call lost" message; in fact, I'm more likely to be talking along and wonder why the person isn't responding, then look down & the call is just not there any longer. I've also started getting a very bad "reverb" style sound at times.

Hello sarabugstar,
A dropped call is not something that we are used to reading about from our customers. Rest assured that we are on the job to get this resolved as soon as possible. Let's start with what zip code are you in? Are you having issues with your data services? Also, can I assume that there isn't any liquid or physical damage on the device? As you share the details of your concern then we can customize a solution for you. I'm looking forward to your reply.
Thank you...
ArnettH_VZW
Follow us on Twitter @VZWSupport

Increased in Dropped calls

I was recently May 2014 upgraded to Iphone5 by the insurance company, due to 4s issue. Since then I have experienced a large number of dropped calls. As recently as last week I had 8 dropped calls in one phone call. I've had more dropped calls in the last two months then I have had the entire 11 years that I have been with verizon. This issue is very irritating and I am truly considering finding another carrier. I have tired all the factory resets that have been suggested on line with no relief. Most of my dropped calls happen within my home, where the phone consistently bounces from the LTE to 1X network. I never has this issue within my home with the previous phones. I have lived in the same house for the last 4 yrs. Has there been a solution found for this issue?

I'm sorry to learn of the service issues you are having with your phone Nette2! You mentioned that you have done factory reset and the issues continue. Try resetting the connection to the network and test: power off>remove SIM card for one minute>insert SIM card>power on. If issues continue try replacing the SIM card at any Verizon Wireless store (free) http://bit.ly/3SdsA and test.
AntonioC_VZW Follow us on Twitter at www.twitter.com/VZWSupport

Dropped calls and no service in my house...why am I even paying a phone bill?

I've been a Verizon customer for probably around 6 or 7 years now. I've had plenty of different devices and was always happy with my phone. A few years ago, service started to get horrible in my house. I would barely get service and my phone would drop calls. I have spent hours over the past 2 years on the phone with reps. Some were very helpful, and some were very frustrating. I have put in service tickets and even changed out my phone to try to get better service. Let me also note that AT&T customers get perfect service inside of my house. I don't even want to hear the excuse that Verizon doesn't guarantee service inside of a building due to building materials. The last time I checked, I didn't rebuild my house in the past few years with new materials. I use my cell phone for business when I'm at home, so it is extremely important that it works inside my house. I put my most recent service ticket in almost 2 weeks ago and there is STILL no resolution. I also won't accept if the only resolution is me buying a network extender.. I'd rather pay an early termination fee and leave before I'd ever spend money on another Verizon device. I have had 2 reps in the past week tell me that they would call me back and I never hear anything. I also have been told that they would resolve it by a certain date, only to find out that now they are saying it's going to stay open until they can figure it out. I rely on my phone for work now more than ever since I recently starting working from home, so how can I accept the fact that I am waiting around and paying for a phone that doesn't work when I need it the most? For all of my trouble, they offered me a $20 credit on my account. I shouldn't even use the word "offered" because I was the one who mentioned that I should be reimbursed for my time. I'm so sick of wasting my time on the phone and I am truly disgusted with Verizon. As a long time customer who has spent thousands of dollars over the year paying for Verizon service, I would expect to be treated much better than this.

I am not in the same boat, Verizon works absolutely everywhere I go and I am super happy with the service. If the service started not working however, and I got no resolve, I would just cancel it and switch providers. No point in paying for service you can't use, especially where you live.

My phone is dropping calls, doesn't ring all the time-goes directly to voice mail, do no recieve alert on when a text is recieved

1-My phone does not ring all the time upon recieving an incoming call, it goes directly to voice mail.
2- Not recieving alert tone upon recieving a text message.
3- Dropping calls also

We have the same problem widespread in our company with iPhone 4's and 5's:
- Fails to establish the call, dials but nothing happens
- Drops the call for no reason even though signal strength is good
- Recevie text alerts to notify of voicemail when the handset has not rung nor does it show missed calls
We migrated someone to a Samsung Galaxy S4 for a month and all these issues went away. Nothing to do with alert tones turned down or faulty silent switches.

HT1386 Just downloaded 7.2 into my Iphone 5 what a mess. Dropped called no audible notifications for email or text messages. Went to the apple store and reset phone to original specs. Now trying to restore apps and music and itunes will not recognize th

Just downloaded 7.2 into my Iphone 5 what a mess. Dropped called no audible notifications for email or text messages. Went to the apple store and reset phone to original specs. Now trying to restore apps and music and itunes will not recognize the phone. I have gone thur the steps for windows 7 and still nothing??? I have downloaded the newest version I itunes too.

Hi Midwestboy,
If your iPhone isn't being recognized by iTunes on your Windows machine, you may find the following article helpful:
iOS: Device not recognized in iTunes for Windows
http://support.apple.com/kb/TS1538
Regards,
- Brenden

Since i got the new Iphone 4s it constantly drops calls. Apple have replaced the phone with another new iphone 4s but i am still having the same problem. I have checked with vodapohe that there is no issue from there end, given a new sim, still drops out

Since i got the new Iphone 4s it constantly drops calls. Apple have replaced the phone with another new iphone 4s but i am still having the same problem. I have checked with vodapohe that there is no issue from there end, given a new sim, still drops out

Have a look at this it might help
http://support.apple.com/kb/TS4148

Phone Dropping calls and disappointed in Verizon

Very disappointed in Verizon Wirelessly. Over the past year my phone has continuously dropped calls. It's getting worse and worse. I went from have decent service 3 years ago to only being able to talk in my bedroom and kitchen over the past year. over the past six months I had to start going outside and now that's become a problem. Even in the town I live there are now many dead spots. 90 percent of my calls drop a day. at times phone won't even ring Some calls and text don't even come through until hours later. People are thinking that I am ducking thief calls, and I'm tired of explaining the situation to them. To make matters worse I have contacting Verizon several times over the past year only to be given the run around. I've been promised help but nothing. some were supposed to call me back with a solution but nothing. I was told a tech was coming, never saw them. I was told to buy a network extender almost 300.00 dollars, but why should I have to pay for this when I'm alrwady paying you every month. I tired of giving Verizon the benefit of the doubt, but I'm close to leaving them and taking many in my community with me, cause im not the only one suffering. Verizon step it up and give me what you promised "the most reliable service in America"
oh and yes I have powered off phone, reset phone, replaced phones 3 times. I've done it all. So once and for all please HELP!!

I am very disappointed at Verizon. I am very very angry right now. I called their customer service about getting a second line on my account and asked them if they had a return policy or if the device is lost or stolen would I be liable. Both customer service reps that I spoke to on the phone both said that I would be able to stop the service as long as it was within the 14 days of purchase. The only money I would not get back would be the money that I would have paid for the telephone, the activation fee and that is ALL. I was going to take the risk and do this and ofcourse we would have to purchase the insurance. But I even had the second customer service rep verify with her supervisor that if the phone was lost or stolen that we could stop the service and would not be responsible for anything more and the two year activation would be stopped. She put me on hold and verified it and came back and said that I was correct and that that was true. So I told her then I will go ahead and go to a verizon store and purchase a phone. When I got there, I was told that it was NOT true. I asked them to open the conversation from customer service and they did and he saw it, but the supervisor at the store would not let me see it.. as if it is a BIG secret. If they can't be honest about it in the beginning then imagine how they are going to screw you in the end. I finally had to walk out and I am so so so disappointed. I want to cancel my existing service, but they have everyone by the balls... and they now it. Something has got to change... Government, NOW it's time to get involved. Anyone with me... say HEY!

CUCM 8.6 Dropped call transfers involving SIP phones

Hi All,
I am a developer who has been tasked with figuring out why call transfers are being dropped by Cisco CUCM when the original call comes from a SIP phone. This scenario works:
Cisco phone calls another Cisco phone, which transfers the original call to a SIP phone
These scenarios do not work:
SIP phone calls Cisco phone, which transfers the original call to another Cisco phone
SIP phone calls Cisco phone, which transfers the original call to another SIP phone
I have researched the Call Manager traces to the best of my ability, and I see some info in there that could potentially point to the source of the problem. I am just unable to understand what the trace means:
10:23:08.672 |//SIP/SIPCdpc(1,74,2342)/ci=24377698/ccbId=175645/scbId=0/active_CcDisconnReq: ccDisconnReq.onBehalfOf=Media : ccDisconnReq.s.sv=2 : ccDisconnReq.c.cv=47 |1,100,63,1.93259^10.10.10.85^*
10:23:08.672 |//SIP/Stack/Info/0x0/sipConstructContainerContext #### Created container=0xb0b42f58|1,100,71,1.1^*^*
10:23:08.672 |//SIP/SIPCdpc(1,74,2342)/ci=24377698/ccbId=175645/scbId=0/appendReasonHdr: appendReasonHdr - Invalid Disconnect Cause(cause=47), No Reason Header Appended|1,100,63,1.93259^10.10.10.85^*
10:23:08.672 |//SIP/SIPCdpc(1,74,2342)/ci=24377698/ccbId=175645/scbId=0/appendRPIDHdrForOriginalCalledParty: SIP device does not Support Orig Dialled Phone nego: 0|1,100,63,1.93259^10.10.10.85^*
I have been wondering whether this could be a codec issue, however the SIP phones we are using are configured with the following codecs:
G711U
G711A
G722
ILBC
GSM
and our SIP software is also set to accept the first codec offered by the remote side. It seems from the SIP client logs that G722 is being used as the codec to communicate with the Cisco phones, but perhaps I'm misinterpreting.
I have attached a CUCM trace of a call from a SIP phone (ext. 491) to a Cisco handset (ext. 170) where the Cisco handset attempts to transfer the call to another SIP phone (ext. 492). The trace snippet shown above is from this log.
I would really appreciate it if someone more experienced with VoIP/SIP/CUCM could take a look and offer any ideas on what the issue might be, and also how we might be able to address it. I can try to provide more info about our CUCM configuration if needed.
Thanks in advance!

Leslie, so here is what I found from the traces....
To understand the difference we need to understand how cucm performs call transfers from a sccp signalling point and a sip signalling point
SCCP
When the transfer key is pressed
1. CUCM sends a CloseReceiveChannel and StopMediaTransmission to the IP phone involved in active media (referenced by the callids)
NB, here CUCM updates the call state on the phone to a call state of 8 which is "Hold"
2.CUCM tells the held party to listen MOH from MOH server
3.CUCM establishes newcall leg with the intended transfered destination..Once this call is connected
4.CUCM receives a new Transfer instruction from the transferring phone to connect the held party
5..CUCM sends a CloseReceiveChannel between the held phone and MOH server (to tear down the media)
6. Next CUCM sends a CloseReceiveChannel and StopMediaTransmission to the transfering party & transfered party to remove Xferring party from call
7. finally CUCM sends OpenReceiveChannel between the original called party and the transfered party..and call is done
For SIP signalling. when the first transfer key is pressed
1. CUCM sends invite (re-invite) with an inactive SDP (a=inactive) to indicate a break in media path
2. CUCM sends a Delayed offer to insert MOH or to resume Media stream
NB: CUCM expects a sendrecv offer with SDP to the DO. (NB:if cucm gets an inactive offer SDP in the 200 OK instead of providing a send-recv offer SDP, the media path remains in an inactive state and causes calls to dropcall will drop),CUCM sends an ACK with sendonly to the 200 OK
3.CUCM establishes newcall leg with the intended transfered destination..Once this call is connected
4.CUCM receives a new Transfer instruction from the transferring phone to connect the held party
5. Next CUCM sends a re-invite with an inactive SDP to indicate a break in media path to MOH (in attempt to complete transfer)
6.Next CUCM sends an inactive SDP to indicate a break in media path between transfering party & transfered party to remove Xferring party from call
7. Next CUCM sends a DO re-invite to connect the transfered party. The far end then sends 200 OK with the required SDP to connect the call
Now having explained all of these, we need to look at where the call is failing for SIP-----SCCP----SIP calls without MTP
lets look at succesful SCCP-----SCCP-----SIP without MTP
Point 4 above
++++++++Extension 170 presses the transfer button to connect the two calls (Callid=24378483)+++++++++++++
(0003395) SoftKeyEvent softKeyEvent=4(Trnsfer) lineInstance=1 callReference=24378483
Point 5 above
++++Next CUCM closed the media between extension 160 and MOH server callid=24378480(this is the only active call on this callid)+++
(0003396) CloseReceiveChannel conferenceID=24378480 passThruPartyID=16777845. myIP: IpAddr.type:0 ipv4Addr:0x0a0a0a89(10.10.10.137)
Point 6 Above
+++++Next cucm closes the call between extension 170 and 490 callid=(24378483)++++++++
(0003395) CloseReceiveChannel conferenceID=24378483 passThruPartyID=16777847. myIP: IpAddr.type:0 ipv4Addr:0x0a0a0a8b(10.10.10.139)
(0003395) StopMediaTransmission conferenceID=24378483 passThruPartyID=16777847. myIP: IpAddr.type:0 ipv4Addr:0x0a0a0a8b(10.10.10.139)
Point 6 above for the sip side (since the destination is SIP, to tear down media to SCCP phone, so as to connect the caller to the xfered party)
+++++++Next CUCM sends a re-invite with a=inactive SDP to the sip phone ++++++++++++
//SIP/SIPTcp/wait_SdlSPISignal: Outgoing SIP TCP message to 10.10.10.104 on port 62220 index 1890
[885626,NET]
INVITE sip:[email protected]:62220;transport=tcp SIP/2.0
Via: SIP/2.0/TCP 10.10.10.195:5060;branch=z9hG4bK23332dbee978
From: ;tag=192115~d8e94532-127d-4dca-bba0-64b1675da032-24378484
o=CiscoSystemsCCM-SIP 192115 2 IN IP4 10.10.10.195
s=SIP Call
c=IN IP4 0.0.0.0
m=audio 24560 RTP/AVP 9 101
a=rtpmap:9 G722/8000
a=ptime:20
a=inactive-----------------------------------------------------Inactive
Still part of Point 6 for SIP signalling
++++++++++++Next sip phone responds with a 200 OK recevonly SDP +++++++++++++++++++
//SIP/SIPTcp/wait_SdlReadRsp: Incoming SIP TCP message from 10.10.10.104 on port 62220 index 1890 with 683 bytes:
[885628,NET]
SIP/2.0 200 OK
v=0
o=- 18077 11099 IN IP4 10.10.10.104
s=yasdjip
c=IN IP4 10.10.10.104
t=0 0
a=ptime:20
a=recvonly-------------------------------------a=recvonly
Finally Point 7 above..
+++++++++++++=Next cucm sends a DO re-invite to extension 492-sip phone++++++++++
//SIP/SIPTcp/wait_SdlSPISignal: Outgoing SIP TCP message to 10.10.10.104 on port 62220 index 1890
[885630,NET]
INVITE sip:[email protected]:62220;transport=tcp SIP/2.0
Via: SIP/2.0/TCP 10.10.10.195:5060;branch=z9hG4bK233534ffec4a
From: ;tag=192115~d8e94532-127d-4dca-bba0-64b1675da032-24378484
To: ;tag=5B0E9816C2CA6D70F3166FB972EDE4C2
+++++++Next we get a 200 OK from sip phone with sdp=sendrecv+++++++++=
/SIP/SIPTcp/wait_SdlReadRsp: Incoming SIP TCP message from 10.10.10.104 on port 62220 index 1890 with 683 bytes:
[885634,NET]
SIP/2.0 200 OK
Via: SIP/2.0/TCP 10.10.10.195:5060;branch=z9hG4bK233534ffec4a
Contact:
From: ;tag=192115~d8e94532-127d-4dca-bba0-64b1675da032-24378484
Call-ID: [email protected]
v=0
o=- 18077 11099 IN IP4 10.10.10.104
s=yasdjip
c=IN IP4 10.10.10.104
t=0 0
m=audio 16574 RTP/AVP 9 101
a=rtpmap:101 TELEPHONE-EVENT/8000
a=fmtp:101 0-15
a=ptime:20
a=sendrecv
+Now CUCM sends an OpenReceiveChannel and start media xmission to sccp phone (callid=24378480) with media parameters of sip phone++++++
(0003396) OpenReceiveChannel conferenceID=24378480 passThruPartyID=16777848 millisecondPacketSize=20 compressionType=6(Media_Payload_G722_64k) RFC2833PayloadType=101 qualifierIn=? sourceIpAddr=IpAddr.type:0 ipAddr:0x0a0a0a68000000000000000000000000(10.10.10.104). myIP: IpAddr.type:0 ipv4Addr:0x0a0a0a89(10.10.10.137)
(0003396) startMediaTransmission conferenceID=24378480 passThruPartyID=16777848 remoteIpAddress=IpAddr.type:0 ipAddr:0x0a0a0a68000000000000000000000000(10.10.10.104)
remotePortNumber=16574 milliSecondPacketSize=20 compressType=6(Media_Payload_G722_64k) RFC2833PayloadType=101 qualifierOut=?. myIP: IpAddr.type:0 ipv4Addr:0x0a0a0a89(10.10.10.137)
+++++++++++=Next Phone sends its ACK+++++++++++++++
(0003396) OpenReceiveChannelAck Status=0, IpAddr=IpAddr.type:0 ipAddr:0x0a0a0a89000000000000000000000000(10.10.10.137), Port=20352, PartyID=16777848
+++++++++++=Next CUCM sends ACK to 200 OK from SIP Phone+++++++++++
//SIP/SIPTcp/wait_SdlSPISignal: Outgoing SIP TCP message to 10.10.10.104 on port 62220 index 1890
[885635,NET]
ACK sip:[email protected]:62220;transport=tcp SIP/2.0
Via: SIP/2.0/TCP 10.10.10.195:5060;branch=z9hG4bK23366067b8c0
From: ;tag=192115~d8e94532-127d-4dca-bba0-64b1675da032-24378484
To: ;tag=5B0E9816C2CA6D70F3166FB972EDE4C2
Date: Tue, 19 Feb 2013 21:44:45 GMT
Call-ID: [email protected]
Max-Forwards: 70
CSeq: 103 ACK
Allow-Events: presence
Content-Type: application/sdp
Content-Length: 237
v=0
o=CiscoSystemsCCM-SIP 192115 3 IN IP4 10.10.10.195
s=SIP Call
c=IN IP4 10.10.10.137
b=TIAS:64000
b=AS:64
t=0 0
m=audio 20352 RTP/AVP 9 101
a=rtpmap:9 G722/8000
a=ptime:20
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
Now at this point all is well...and the call is connected....
Now here is where the call is failing on the SIP-SCCP-SIP call without MTP
From Point 2 above, CUCM sends a DO to insert MOH, and then gets response, then sends an ACK to 200 Ok back to SIP Phone..
//SIP/SIPTcp/wait_SdlSPISignal: Outgoing SIP TCP message to 10.10.10.104 on port 53361 index 1810
[881160,NET]
ACK sip:[email protected]:53361;transport=tcp SIP/2.0
Via: SIP/2.0/TCP 10.10.10.195:5060;branch=z9hG4bK22035ecc1fcb
From: ;tag=190666~d8e94532-127d-4dca-bba0-64b1675da032-24378214
To: "492" ;tag=97C34E1FB9A11F83DD8D8F5BA4C87C57
Date: Tue, 19 Feb 2013 17:38:50 GMT
Call-ID: 1CCA5149B966DC89AE0F752B8EF86480BC7102DB
Max-Forwards: 70
CSeq: 102 ACK
o=CiscoSystemsCCM-SIP 190666 3 IN IP4 10.10.10.195
s=SIP Call
c=IN IP4 10.10.10.195---------------------------------------IP address of MOH server
t=0 0
m=audio 4000 RTP/AVP 0--------------------------------MOH port 4000
a=rtpmap:0 PCMU/8000
a=ptime:20
a=sendonly---------------------------------------------------------sendonly
+++++NOW Point 6 above (SIP) CUCM sends a=inactive to break media path to MOH server to connect caller and xfered party++++++
//SIP/SIPTcp/wait_SdlSPISignal: Outgoing SIP TCP message to 10.10.10.104 on port 53361 index 1810
[881161,NET]
INVITE sip:[email protected]:53361;transport=tcp SIP/2.0
Via: SIP/2.0/TCP 10.10.10.195:5060;branch=z9hG4bK22045bb7f918
From: ;tag=190666~d8e94532-127d-4dca-bba0-64b1675da032-24378214
To: "492" ;tag=97C34E1FB9A11F83DD8D8F5BA4C87C57
Date: Tue, 19 Feb 2013 17:39:04 GMT
Call-ID: 1CCA5149B966DC89AE0F752B8EF86480BC7102DB
Supported: timer,resource-priority,replaces
Min-SE: 1800
User-Agent: Cisco-CUCM8.6
Allow: INVITE, OPTIONS, INFO, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY
CSeq: 103 INVITE
Max-Forwards: 70
Expires: 180
Allow-Events: presence
Remote-Party-ID: ;party=calling;screen=yes;privacy=off
Contact:
Content-Type: application/sdp
Content-Length: 164
v=0
o=CiscoSystemsCCM-SIP 190666 4 IN IP4 10.10.10.195
s=SIP Call
c=IN IP4 0.0.0.0--------------------------------------------------------------------Media IP is 0.0.0.0
t=0 0
m=audio 4000 RTP/AVP 0
a=rtpmap:0 PCMU/8000
a=ptime:20
a=inactive---------------------------------------------------------------------media inactive
At this point, we should get a response back from the sip phone...
and here is what we got..
++Trying which is expected++++
//SIP/SIPTcp/wait_SdlReadRsp: Incoming SIP TCP message from 10.10.10.104 on port 53361 index 1810 with 331 bytes:
[881162,NET]
SIP/2.0 100 Trying
Via: SIP/2.0/TCP 10.10.10.195:5060;branch=z9hG4bK22045bb7f918
From: ;tag=190666~d8e94532-127d-4dca-bba0-64b1675da032-24378214
Call-ID: 1CCA5149B966DC89AE0F752B8EF86480BC7102DB
CSeq: 103 INVITE
To: "492" ;tag=97C34E1FB9A11F83DD8D8F5BA4C87C57
Content-Length: 0
++++++++Then we get a BYE+++++++++++++++
/SIP/SIPTcp/wait_SdlReadRsp: Incoming SIP TCP message from 10.10.10.104 on port 53361 index 1810 with 576 bytes:
[881163,NET]
BYE sip:[email protected]:5060;transport=tcp SIP/2.0
Via: SIP/2.0/TCP 10.10.10.104:53361;branch=z9hG4bKa2vdQvR7J9OiMyjU;rport
Contact:
Max-Forwards: 70
From: "492" ;tag=97C34E1FB9A11F83DD8D8F5BA4C87C57
Allow: OPTIONS, INVITE, ACK, REFER, CANCEL, BYE, NOTIFY
Supported: replaces, path
User-Agent: Acrobits Softphone Business/2.4.8
To: ;tag=190666~d8e94532-127d-4dca-bba0-64b1675da032-24378214
Call-ID: 1CCA5149B966DC89AE0F752B8EF86480BC7102DB
CSeq: 3 BYE
Content-Length: 0
So this is the root cause of the problem. Your SIP phone does not know how to respond to multiple media break between it and the MOH server.
The difference between this and the succesful SCCP-SIP--SCCP, is that the held party was a sccp phone, hence the sip phone only has to process one a=inactive SDP message, where as in the SIP-SCCP-SIP, the help party was sip, so the sip phone has to process two a=inactive SDP messages
Now what is the difference when MTP is involved! A Big difference. MTP stays in the media path. So there is never a break in media and no inactive SDP attribute is sent. The flow looks like below:
for the initial call...The SIP phone sends its media to MTP and likewise the SCCP phone
SIP------Media------MTP------------Media-------SCCP Phone
When the new destination is dialled and transfer is commited,
SIP-------------media----MTP--------media---------MTP
The final invoite sent to connect 492 and 491 has MTP as the IP address to connect Media to.
++++++++Ivite to 492 ++++++++++++++
INVITE sip:[email protected]:61303;transport=tcp SIP/2.0
Via: SIP/2.0/TCP 10.10.10.195:5060;branch=z9hG4bK231a3b24b862
From: ;tag=192048~d8e94532-127d-4dca-bba0-64b1675da032-24378472
To: ;tag=78FF5BF6C019A55EA020B69BB6A767E2
Date: Tue, 19 Feb 2013 21:24:59 GMT
Call-ID: [email protected]
Supported: timer,resource-priority,replaces
Min-SE: 1800
User-Agent: Cisco-CUCM8.6
Allow: INVITE, OPTIONS, INFO, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY
CSeq: 102 INVITE
Max-Forwards: 70
Expires: 180
Allow-Events: presence
Remote-Party-ID: ;party=calling;screen=yes;privacy=off
Contact:
Content-Type: application/sdp
Content-Length: 214
v=0
o=CiscoSystemsCCM-SIP 192048 1 IN IP4 10.10.10.195
s=SIP Call
c=IN IP4 10.10.10.195---------------------------------------------------------------the MTP ip address
t=0 0
m=audio 25038 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=ptime:20
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
+++++++Invite to 491 +++++++++++++++++
//SIP/SIPTcp/wait_SdlSPISignal: Outgoing SIP TCP message to 10.10.10.94 on port 50376 index 1887
[885429,NET]
INVITE sip:[email protected]:50376;transport=tcp SIP/2.0
Via: SIP/2.0/TCP 10.10.10.195:5060;branch=z9hG4bK231b78d1b56
From: ;tag=192046~d8e94532-127d-4dca-bba0-64b1675da032-24378467
To: "491" ;tag=F13CE94DE942C47680356A647DC7F916
Date: Tue, 19 Feb 2013 21:24:59 GMT
Call-ID: AE7045FFB2D8D9C28D54651473A14A5D41B5B93C
Supported: timer,resource-priority,replaces
Min-SE: 1800
User-Agent: Cisco-CUCM8.6
Allow: INVITE, OPTIONS, INFO, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY
CSeq: 101 INVITE
Max-Forwards: 70
Expires: 180
Allow-Events: presence
Remote-Party-ID: "Leslie2" ;party=calling;screen=no;privacy=off
Contact:
Content-Type: application/sdp
Content-Length: 237
v=0
o=CiscoSystemsCCM-SIP 192046 1 IN IP4 10.10.10.195
s=SIP Call
c=IN IP4 10.10.10.195----------------------------------------MTP
b=TIAS:64000
b=AS:64
t=0 0
m=audio 25030 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=ptime:20
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
Wao! That was a long one isnt it...It was fun too.
So now you can look at your sip phones and see if they can accept two inactive sdp messages within the same call. That way you can remove MTP. otherwise you will have MTP involved in every single call involving a sip phone, even if they do not involve transfers
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tintamundo wrote:
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