fix typos

Author: aakanmu

articles/communication-services/resources/troubleshooting/voice-video-calling/general-troubleshooting-strategies/includes/server-code-subcode.md

@@ -31,7 +31,7 @@ ms.subservice: calling
 | 10004 | 487 | Call was canceled on timeout, no callee endpoint accepted on time. Ensure that user saw the notification and try to initiate that call again. | ExpectedError | |
 | 10024 | 487 | Call ended successfully as it was declined by all callee endpoint. | Success | - Try to place the call again. |
 | 301005 | 410 | Participant was removed from the call by the Azure Communication Services infrastructure due to loss of media connectivity with Azure Communication Services infrastructure, this usually happens if participant leaves the call abruptly or looses network connectivity. If participant wants to continue the call, it should reconnect. | UnexpectedClientError | - Ensure that you're using the latest SDK in a supported environment.<br> |
-| 510403 | 403 | Call blocked:<br/> - Alternate ID not supplied for the call.<br/> - Phone number not allowed by users Session Border Controller (SBC).<br/> - Previously markes as spam and now blocked. | ExpectedError | For more information about Alternate ID, see [Manage calls](../../../../../how-tos/calling-sdk/manage-calls.md#place-a-call).<br/> - Make sure that you specified a valid Alternate ID. It must be a phone number that belongs to the Resource you're using.<br/> - Verify that you own the Resource you're using to make a call.<br/> - For direct routing calls, verify why your Session Border Controller disallowed the call.<br/> - Ensure that your Communication Services token is valid and not expired. |
+| 510403 | 403 | Call blocked:<br/> - Alternate ID not supplied for the call.<br/> - Phone number not allowed by user's Session Border Controller (SBC).<br/> - Previously marked as spam and now blocked. | ExpectedError | For more information about Alternate ID, see [Manage calls](../../../../../how-tos/calling-sdk/manage-calls.md#place-a-call).<br/> - Make sure that you specified a valid Alternate ID. It must be a phone number that belongs to the Resource you're using.<br/> - Verify that you own the Resource you're using to make a call.<br/> - For direct routing calls, verify why your Session Border Controller disallowed the call.<br/> - Ensure that your Communication Services token is valid and not expired. |
 | 540487 | 487 | Call ended successfully as caller canceled the call. | Success | |
 | 560000 | 0 | Call ended successfully by remote PSTN participant. | Success |Possible causes:<br> - User ended the call.<br> - Call was ended by media agent.<br> |
 | 560486 | 486 | Call ended because remote PSTN participant was busy. The number called was already in a call or having technical issues. | Success | - For Direct Routing calls, check your Session Border Control logs and settings and timeouts configuration.<br> Possible causes: <br>  - The number called was already in a call or having technical issues.<br> |

articles/communication-services/resources/troubleshooting/voice-video-calling/includes/codes/pstn.md

@@ -40,7 +40,7 @@ Response `ParticipantEndReason` with value 4xx means that the call didn't connec
 
 | SubCode | Code | Message | Result Categories | Advice |
 |--- |--- |--- |--- |--- |
-| 510403 | 403 | Call blocked:<br/> - Alternate ID not supplied for the call.<br/> - Phone number not allowed by users Session Border Controller (SBC).<br/> - Previously markes as spam and now blocked. |  | For more information about Alternate ID, see [Manage calls](../../../../../how-tos/calling-sdk/manage-calls.md#place-a-call).<br/> - Make sure that you specified a valid Alternate ID. It must be a phone number that belongs to the Resource you're using.<br/> - Verify that you own the Resource you're using to make a call.<br/> - For direct routing calls, verify why your Session Border Controller disallowed the call.<br/> - Ensure that your Communication Services token is valid and not expired. |
+| 510403 | 403 | Call blocked:<br/> - Alternate ID not supplied for the call.<br/> - Phone number not allowed by user's Session Border Controller (SBC).<br/> - Previously marked as spam and now blocked. |  | For more information about Alternate ID, see [Manage calls](../../../../../how-tos/calling-sdk/manage-calls.md#place-a-call).<br/> - Make sure that you specified a valid Alternate ID. It must be a phone number that belongs to the Resource you're using.<br/> - Verify that you own the Resource you're using to make a call.<br/> - For direct routing calls, verify why your Session Border Controller disallowed the call.<br/> - Ensure that your Communication Services token is valid and not expired. |
 | 560403 | 403 | - Call forbidden.<br/> - Call canceled.<br/> - Call rejected. |  | Make sure that you called a valid phone number in the correct format. For more information about supported number formats, see <https://en.wikipedia.org/wiki/E.164>. |
 | 511532 | 403 | Resource SIP trunk configuration not found. |  | Check your direct routing setup in the [Azure portal](https://portal.azure.com). For more information, see [Direct routing provisioning](../../../../../concepts/telephony/direct-routing-provisioning.md). |
 | 560404 | 404 | - Phone number not found.<br/> - Phone number not assigned to any target.<br/> - Phone number not allowed by Session Border Controller.  |  | - Make sure the phone number belongs to the Resource you're using and that you own the Resource.<br/> - Verify that the number you're calling exists, and is assigned to valid target. |