The SIP Trunking Platform and SIP Inbound Platform provide a lot of information about the state of calls, both successful and failed. Below is a simple guide to understanding what the status and response codes mean, both to you, and the end-user.
| Status Code | Status Reason | Description |
| 200 | OK | Indicates the request was successfully connected |
| Status Code | Status Reason | Description |
| 404 | Not Found / No Route Found | The number requested was not found. If this is an inbound call, suggest checking our PBX or CPE is configured to allow this number, and in the correct format (e164). For outbound calls, ensure the number is valid. If it is, please contact support. |
| 486 | Busy Here | Callee is Busy. There are a number of reasons for this to happen. Examples include: - 1. Handset the number is pointing to is in-use 2. Number of channels licensed on the CPE isn't enough |
| 487 | Request Terminated | Request has terminated by bye or cancel. This generally happens when the Caller hangs up before the Callee has answered the call. |
| 500 | Internal Server Error | The server could not fulfil the request due to some unexpected condition. This can happen for many reason, however the most common one is numbers are not configured on customer PBX/CPE. |
| 603 | MaxPeak Cost Exceeded | This will be generated by the Outbound Platform. This specifically related to the maximum cost any call can incur, per minute (based on your most recent rate card). If you wish to have this limit increased, please contact support. |
Callee: The person who receives the call
Caller: The person who makes the call
PBX: Customers phone system
CPE: Equipment connected to the SIP trunk (SBC etc)
SBC: Session Border Controller