Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




2 posts

Wannabe Geek

GOWIFI

Topic # 143891 30-Apr-2014 18:22
Send private message

Hopefully someone might be able to help as my head is very sore from banging it against the wall :-)

Configuration/Background info:
We have a Grandstream UCM6102 PBX with a bunch of Grandstream IP Phones.
We have two Open VFX trunks and one 2Talk trunk.
We are using the VFX trunks for incoming and 2talk for outgoing. 
Before moving to the UCM6102 we used AsteriskNow with FreePBX and Cisco phones - all was working fine.

Problem:
Incoming calls lose audio (both directions) when a call is blind transferred to another extension. The call also remains connected (doesn't disconnect/terminate) at the end that doesn't terminate the call.

What i have tested/What i know:
- Attended transfers work perfectly.
- If i make an incoming call with 2talk - blind transfers work.
- If i make an outgoing call with WxC - blind transfers work.
- If i make an incoming call with WxC - blind transfers fail.
- I have tried playing with codecs (setting phone, extensions, and PBX to use PCMA, PCMU, GSM, G.729).

Please let me know if anyone requires more information or has any ideas. I am in contact with Grandstream Support and although they have been extremely helpful have not been able to help me resolve the issue.


Thanks.

Dan

Create new topic
25979 posts

Uber Geek
+1 received by user: 5654

Moderator
Trusted
Biddle Corp
Lifetime subscriber

  Reply # 1034224 30-Apr-2014 19:48
Send private message

Could be any number of things but the first thing to look at would to look at whether a re-invite is occurring and Asterisk is attempting a directmedia setup.

Are the phones all on the same LAN subnet and is the PBX also on the same subnet?







2 posts

Wannabe Geek

GOWIFI

  Reply # 1034688 1-May-2014 11:42
Send private message

Thanks for your response. 

All Phones and PBX are on the same LAN. The PBX is running behind NAT (does not have its own public IP)

Going through the Captures i can see the following:

It looks like the INVITE that is forwarded to the WxC SIP trunk from the PBX to complete the blind transfer is denied by WxC with a 401 Unauthorized error which is received twice by the PBX.



 
 
 
 


266 posts

Ultimate Geek
+1 received by user: 26


  Reply # 1034867 1-May-2014 15:02
Send private message

Hey, if you can PM your phone number I'll take a look at it.
Also a call example of when this failed please.

25979 posts

Uber Geek
+1 received by user: 5654

Moderator
Trusted
Biddle Corp
Lifetime subscriber

  Reply # 1035078 1-May-2014 19:27
Send private message

gowirelessnz: Thanks for your response. 

All Phones and PBX are on the same LAN. The PBX is running behind NAT (does not have its own public IP)

Going through the Captures i can see the following:

It looks like the INVITE that is forwarded to the WxC SIP trunk from the PBX to complete the blind transfer is denied by WxC with a 401 Unauthorized error which is received twice by the PBX.




So it sounds like you've definately got directmedia enabled which is causing reinvites and a SIP401 because it's (for some reason) not authorised. Without seeing a full packet capture and config it's not really possible to know exactly why.

You should really only use directmedia with Asterisk if you really understand what it's doing. In your situation there isn't really a need for the PBX to be eliminated from the call path.


Create new topic



Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

Samsung New Zealand introducing the Galaxy S9 and S9+
Posted 26-Feb-2018 07:00


Fujifilm X beats its best with new top of the range, high-performance camera
Posted 24-Feb-2018 14:05


One million kiwis affected by cybercrime
Posted 24-Feb-2018 13:58


New Zealanders want to engage with government online and via mobile apps
Posted 24-Feb-2018 13:56


Samsung launches Samsung Max
Posted 24-Feb-2018 13:52


CPTPP text and National Interest Analysis released for public scrutiny
Posted 21-Feb-2018 19:43


Foodstuffs to trial digitised shopping trolleys
Posted 21-Feb-2018 18:27


2018: The year of zero-login, smart cars & the biometrics of things
Posted 21-Feb-2018 18:25


Intel reimagines data centre storage with new 3D NAND SSDs
Posted 16-Feb-2018 15:21


Ground-breaking business programme begins in Hamilton
Posted 16-Feb-2018 10:18


Government to continue search for first Chief Technology Officer
Posted 12-Feb-2018 20:30


Time to take Appleā€™s iPad Pro seriously
Posted 12-Feb-2018 16:54


New Fujifilm X-A5 brings selfie features to mirrorless camera
Posted 9-Feb-2018 09:12


D-Link ANZ expands connected smart home with new HD Wi-Fi cameras
Posted 9-Feb-2018 09:01


Dragon Professional for Mac V6: Near perfect dictation
Posted 9-Feb-2018 08:26



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.