TABLE OF CONTENTS Ich weiss nicht was soll es bedeuten
Dass ich so traurig bin;
Ein M chen aus alten Zeiten
Das kommt mir nicht aus dem Sinn
I don't know what's the meaning of the fact
That I'm in such a sad mood;
A legend from olden days
I can't get it out of my mind
Heinrich Heine, 1823, Die Lorelei
Small or new telecommunications operators may want to minimize their initial capital expenditures. The virtual SMSC offers these operators a way to provide SMS service to their customers without buying an SMSC. They use a third-party SMSC that charges them on the basis of the amount of SMS traffic, so revenues can be generated without any investment.
Having transit agreements is a way for large or medium operators to get additional revenues by renting their roaming agreements to a third party (the SMS interworking network), but they retain full, legal responsibility for their use. The SMS interworking network will pay the operator for any SMS sent within its roaming agreements.
The subjects of virtual SMSC and transit agreements are treated within the same chapter because any third party implementing a virtual SMSC for an operator (main SMSC or backup SMSC) has access to all roaming agreements for the sending of SMS-MT as explained in this chapter. The first part of the chapter covers SMS-MO and virtual SMSCs; the second covers the various implementation of transit agreements. The only setup is that of STPs or GMSCs to provide specific...
