Table of Contents

Routing Engine

When a call first lands on the system it hits the routing engine. The routing engine follows the process:

Ingress and Egress.

Ingress means inbound and egress means outbound. If this is describing a switch (for IP auth), the direction is relative to the switch that you are currently describing. E.g if you add a customer's switch that will be sending traffic to terminate with a carrier, the customer's switch would be considered Egress as it is sending calls out. If it has a DID pointing to it, it would be Ingress as traffic would be flowing into it.

If a call bound for termination comes into the routing engine, after it passes authorisation it will go through ingress routing. This decides the profile of the call and where it is passed to next. There is no Egress routing section per se. The egress routing is built into the customer's rate card as this contains 1 or more carriers and, optionally, a routing strategy (default LCR).

Error Codes

If your SIP Trace shows that an INVITE packet was received by the switch but not sent out to any providers, the fail will be in the ingress routing.

SIP Code SIP Reason Details
403 IP Not Authorised The IP Address does not match any account in the system.
500 Unidentified Internal Switch This is an internal error, you should never see this. If you do please contact us.
500 Server not accepting calls (Paused) Your account with ConnexCS has been disabled or your server has been disabled.
503 Unknown User Username & Passwords do not match to any known user account.
503 Unable to perform LRN You have selected LRN dipping for this route, however it is likely that you don't have credit with us.
503 LCR Unavailable The system is unable to perform a LCR lookup.
503 Blocked by Dialplan The prefix/number is not matched by the allowed dial plan.
503 No Routes Available (Pre) There is no rate card rule to allow the call to progress.
503 No Routes Available (U) No routes are available either due to: Lock, Profit Assurance, Routing Strategy or ScriptForge.
503 No Routes Available (Lock) Locking your Ingress routing has left no routing options.
503 No Routes Available (Profit Assurance) Profit Assurance has left no routing options.
503 Dropping Call (Strategy) Strategic Routing has dropped the call.
503 Internal Strategic Routing Error There is an error with the config of Strategic Routing.
580 No Route Available The number dialled does not match any ingress routing profile.
580 Switch IP Variable Not Provided This is an internal error, you should never see this. If you do please contact us.
580 To (oU) User Missing This is an internal error, you should never see this. If you do please contact us.
580 To (fU) User Missing This is an internal error, you should never see this. If you do please contact us.

Note: When making changes, although we try to synchronise all endpoints as fast as possible, as this is a distributed system it can take up to 60 seconds for any changes to take affect.