I have just gone wireless with the above router and on asking about internet speeds I got a request to make sure my router settings are correct as follows.
A good start would be to read the set up manual that came with the router. The figures you gave are standard as you will find out. PPPoATM usually as PPAoA1 standard or with multiple LAN cross domain names. VPI=0 VCI=38 factory router setting QoS: UBR factory router setting MTU: 1458 can be as high as 1500