Update network-requirements.md

updated column name

Author: valindrae

articles/communication-services/concepts/voice-video-calling/network-requirements.md

@@ -62,7 +62,7 @@ Communication Services connections require internet connectivity to specific por
 | Media traffic | Range of Azure public cloud IP addresses 20.202.0.0/16 The range provided above is the range of IP addresses on either Media processor or Azure Communication Services TURN service. | UDP 3478 through 3481, TCP ports 443 |
 | Signaling, telemetry, registration| *.skype.com, *.microsoft.com, *.azure.net, *.azure.com, *.office.com| TCP 443, 80 |
 | Call Automation Media | 52.112.0.0/14, 52.122.0.0/15, 2603:1063::/38|	UDP: 3478, 3479, 3480, 3481|
-| Callback URLs | *.lync.com, *.teams.cloud.microsoft, *.teams.microsoft.com, teams.cloud.microsoft, teams.microsoft.com 52.112.0.0/14, 52.122.0.0/15, 2603:1027::/48, 2603:1037::/48, 2603:1047::/48, 2603:1057::/48, 2603:1063::/38, 2620:1ec:6::/48, 2620:1ec:40::/42 | TCP: 443, 80 UDP: 443 |
+| Call Automation callback URLs | *.lync.com, *.teams.cloud.microsoft, *.teams.microsoft.com, teams.cloud.microsoft, teams.microsoft.com, 52.112.0.0/14, 52.122.0.0/15, 2603:1027::/48, 2603:1037::/48, 2603:1047::/48, 2603:1057::/48, 2603:1063::/38, 2620:1ec:6::/48, 2620:1ec:40::/42 | TCP: 443, 80 UDP: 443 |
 
 
 The endpoints below should be reachable for U.S. Government GCC High customers only.