What is a CSDR (CSD Router) and where can I get one?
CSD=Circuit Switched Data, is a protocol that the mobile phone uses when you make a data call. The CSD router is the hardware that answers to the incoming data calls and then transmits the UDP packets sent by the WAP phone forward to the gateway. In other words the CSD router can be a normal analog modem, ISDN terminal or an array of these (like a modem pool).The UPD packets are picked up by a UDP thread of the bearerbox in the gateway.
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