Least cost routing

[Alex Kinch]

Hi,   I'm currently getting to grips with least cost routing of messages. As we don't currently have any reliable MCC/MNC lookup facilities, we're having to do this by country prefix.   As far as I can see there's two ways I can do this: 1. implement preferred-prefix on each SMSC, or 2. put prefix matching in our application to select the SMSC using the smsc variable on the HTTP GET call to Kannel.   There were discussions previously about building an HLR box for Kannel, to retrieve MCC/MNC from a number using SS7. I've looked at a couple of third parties that offer an HTTP-based lookup of MCC/MNC for approx $0.024 per lookup - but when you're on tight margins as it is that's quite an overhead on the delivery costs.   I remember when we discussing this before, Nisan made a valid point that if there was a hash table in Kannel, how often would it need to be refreshed.. We were thinking on a monthly basis, but then if someone ports their number to another network and one of our users just happens to text them 10-15 times a day, we'd potentially end up losing a large chunk of money until their network information is refreshed!   Anyone like to share some thoughts on this whole thing? Stipe you must have experience of this as I imagine you're doing some sort of destination routing for Centrium?   Alex