SfB Server 2015: SIP/2.0 503 Service Unavailable

While working on a PSTN integration with Skype for Business Server 2015, we notice that the inbound calls were being rejected immediately with SIP/2.0 503 Service Unavailable: TL_INFO(TF_PROTOCOL) [festd\festd]6984.23A4::03/06/2017-22:56:29.167.0000245B (S4,SipMessage.DataLoggingHelper:sipmessage.cs(801)) [4223311279] >>>>>>>>>>>>Outgoing SipMessage c=[<SipTcpConnection_1ACDDA8>], 172.20.20.40:5068->172.20.15.39:56945 SIP/2.0 503 Service Unavailable FROM: "Joule Adams"<sip:09920156101;phone-context=PrivateUnknown@recore.lab;user=phone>;tag=f0d14b5566;epid=8CE36BBBAB TO: <sip:+449920207101@172.20.20.40;user=phone>;tag=9837f16c5d;epid=14123C3787 CSEQ: 12538 INVITE CALL-ID: 49bfd2ea-8753-4651-a8aa-d7b48d066d93 VIA: SIP/2.0/TCP 172.20.15.39:56945;branch=z9hG4bKdab2e468 CONTENT-LENGTH: 0 SERVER: RTCC/6.0.0.0 … Continue reading SfB Server 2015: SIP/2.0 503 Service Unavailable

Lync/SfB Server: Create a custom announcement for Unanswered Calls

We were asked if we could customize the sound/tone for unanswered calls when the called user isn't voice mail enabled. Usually the mobile networks will play a announcement like "Sorry, the person you tried to call isn't available please try again later". In Lync/SfB Server we cannot change the default tone, however, we can use … Continue reading Lync/SfB Server: Create a custom announcement for Unanswered Calls

Missed call notification when the call is blocked by CallerIDBlock MSPL Script

After deploying the CallerIDBlock script, some users mentioned that they received a Missed Call Notification in their mailbox. During our troubleshooting process, we found out that this was happening because the priority of the CallerIDBlock was low: Get-CsServerApplication | ft -AutoSize https://technet.microsoft.com/en-us/library/gg425948.aspx In this example, the CallerIDBlock has priority 12, while DefaultRouting has 8. The Missed Call Notification is generated by … Continue reading Missed call notification when the call is blocked by CallerIDBlock MSPL Script

Blocking Calls on Lync Server and Skype for Business Based on Caller ID

Update 2016/04/01 - To avoid Missed call notifications check Missed call notification when the call is blocked by CallerIDBlock MSPL Script Last week a customer asked how we can block calls in Lync Server. After some searching, I found the following post: VoIPNorm's UC Blog - Blocking Calls in Lync Based on Caller ID Unfortunately, the comments refer … Continue reading Blocking Calls on Lync Server and Skype for Business Based on Caller ID

AudioCodes 420HD and Lync Address Book Service

After January 2014 firmware release, the Audiocodes 420HD got a nice feature — Lync Address Book service query. Before this update we could add a LDAP as Corporate Directory source, but this was based on Active Directory information and not on Lync Address Book service. Also, we couldn't see the user presence information on searched contact. In UC_2.0.3.16 firmware … Continue reading AudioCodes 420HD and Lync Address Book Service

AudioCodes 420HD – Failed to validate server

AudioCodes 420HD can be a good replacement for Lync Phone Editions, at least regarding its price. However, don't expect to have all the features that exist in the Lync Phone Editions. In addition, AudioCodes has already promised to enable Better Together over Ethernet to 420HD, 430HD and 440HD in a future firmware release. The provisioning of these phones is … Continue reading AudioCodes 420HD – Failed to validate server

EnableFastFailoverTimer in Lync Server 2013 Trunk Configuration

New stuff has been added to Lync Server 2013 but some things aren't visible right away. On the Lync administrator side the interface didn't change much – Control Panel and Topology are almost the same, and PowerShell is still black. "Under the hood", we will find out that things are quite different – new settings, new … Continue reading EnableFastFailoverTimer in Lync Server 2013 Trunk Configuration