PSTN calls drop with-in 15 - 30 mins with Audiocodes SBC
Hi Community, Recently, I have come across a scenario worth sharing. PSTN calls drops after 15 mins or 30 mins with Audio Codes SBC or Gateway. This can be related or occur due to numerous reason, however if everything is in place (Network to Configuration) and still the call fails, then you can try the below and if it makes the difference. User makes PSTN call > the flow and connectivity is established > after 15 or 30 mins you see BYE message generated resulting in call drop. changing/modifying the "RTCPActiveCalls" and "EnableSessionTimer" may help or simple does't make any difference. Upon isolation, found that issue is mostly triggered due to a setting in Audio Codes S.B.C "Reset SRTP Upon Re-Key" is enabled (usually disabled by default) By going in to the IP profiles > disabling the setting in AudioCodes the issue was resolved and calls no longer were dropped. P.S - This solution may or may not help you (no harm in trying), But its best recommended to contact support and take assistance if needed 🙂
Polycom VVX 411 Signing out Users at Random
Hello, We are about to roll out Polycom VVX411 phones using SfB but in our testing users are getting logged out seemingly randomly between 7-30 days. They do get an error "Exchange authentication failed. Sign out and sign in again." on their Polycom phones about 1-2 hours before the phone actually logs them out. We are running Polycom UC Software version 5.9.3.2857 We have MFA enabled for our end users also. We are using SfB and Exchange online, nothing on-prem. Has anyone seen or fixed this issue in their environment? Thanks!
Initiate PSTN call from teams to public landline.
Hi all, This is my first post. I search on this concept thoroughly beforehand. But couldn't seem to find anything I have looked into the cloud communications part of the MS #GraphApi in order to make a proof of concept regarding: initiating pstn calls from a 3rd party program through Teams to a public landline. Looking at examples like: https://docs.microsoft.com/en-us/graph/api/call-redirect?view=graph-rest-beta&tabs=http#example-3-forward-a-call-to-a-pstn-number I would imagine that I might be able to something along the lines: User1 in company Contoso activates a method in 3rd party program. Which sends a command to a call bot The call bot initiate a connection to User1 in company Contoso On reply (preferably automatic) The bot calls the designated landline from the 3rd party program When the PSTN call is accepted by UserB in Acme Inc. The call is "merged" and the bot leaves the call. Is this even doable ? Have someone made something similar. If there is another solution that is easier that is also very much welcome. Looking much forward to your comments.Skype for business CU 10 install breaks call transfer on polycom VVX
We have on premise SFB 2 FE 2Edge 2 MediationServer 2 web app 2 SQL always on We use pureip for the gateway and sit web services behind a load balancer All other services use Microsoft recommended DNS load balancing I installed the July CU 10 last week all went well and all DB updates done We rebooted all severs and everything came back online Next days polycom vvx users started to report transfers of incoming PSTN calls not working. We tested the senators and found PSTN calls inbound would reach polycom and could be answered, the use would hit transfer and dial either an internal extension or another PSTN. Immediately phone would say transfer failed. Caller would be put on hold and when users resumes call there would be one way audio. Caller could here user but user could here caller Transfers would work fine from Skype client and mobile app and hold was fine also. ThanksPSTN callers can't hear us
1. Teams Only organization w/Phone System/Calling Plans 2. Polycom VVX VoIP phones (latest SfB online certified firmware) When someone calls in, the Polycom phones and Teams apps that are logged into that account ring, but when we answer one of the Polycom phones, the person calling us cannot hear us. We can hear them. This happens about 3/4 of the time, but not always, and with seemingly no pattern. It doesn't seem to happen when answering using the actual Teams app - only when using the Polycom phones. I've checked out our firewall settings and we are not blocking any of the documented ports or ranges of ports that need to be open, and there is nothing in the actual call log that indicates something is going wrong. I'm at a loss as to how to even begin troubleshooting this. Any advice as to where I can look for clues? Thanks, BobDial pad not showing on Skype for Business room system
I have newly setup a Lenovo Thinksmart hub for use with Skype for Business. I have assigned a 'Meeting Room' licence and also a 'Domestic and International Calling plan' On system restart, the dialpad option is available until the Skype has signed in then it disappears. I can dial out numbers using the 'Start meeting', but hoped the dialpad would be visible all the time for making normal phone calls. Also the system seems very buggy with the keyboard not wanting to pop up when clicking to add invitees
