Update Set-CsOnlinePSTNGateway.md

Author: teddygyabaah

teams/teams-ps/teams/Set-CsOnlinePSTNGateway.md

@@ -22,7 +22,7 @@ Set-CsOnlinePSTNGateway [[-Identity] <string>] [-BypassMode <string>] [-Descript
  [-FailoverResponseCodes <string>] [-FailoverTimeSeconds <int>] [-ForwardCallHistory <boolean>] [-ForwardPai <boolean>] [-GatewayLbrEnabledUserOverride <boolean>]
  [-GatewaySiteId <string>] [-GatewaySiteLbrEnabled <boolean>] [-InboundPstnNumberTranslationRules <Object>] [-InboundTeamsNumberTranslationRules <Object>]
  [-MaxConcurrentSessions <int>] [-MediaBypass <boolean>] [-MediaRelayRoutingLocationOverride <string>] [-OutboundPstnNumberTranslationRules <Object>]
- [-OutboundTeamsNumberTranslationRules <Object>] [-PidfLoSupported <boolean>] [-ProxySbc <string>] [-SendSipOptions <boolean>] [-SipSignalingPort <int>]
+ [-OutboundTeamsNumberTranslationRules <Object>] [-PidfLoSupported <boolean>] [-ProxySbc <string>] [-SendSipOptions <boolean>] [-SipSignalingPort <int>] [-IPAddressVersion <string>] 
  [-WhatIf] [-Confirm] [<CommonParameters>]
  ```
 
@@ -378,6 +378,20 @@ Accept pipeline input: False
 Accept wildcard characters: False
 ```
 
+### -IPAddressVersion
+Possible values are "IPv4" and '"Pv6". When "IPv6" is set, the SBC must use IPv6 for both signaling and media. **Note: IPv6 is supported only for non-media bypass scenarios.**
+ 
+```yaml
+Type: String
+Parameter Sets: (All)
+Aliases:
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
 ### -WhatIf
 Shows what would happen if the cmdlet runs.
 The cmdlet is not run.