Hi,
I achieve connections with Motorola ModemSurf only
at 
33.6Kbit/s. 
The Max1800 code: 5.0Ap20
The modem firmware: ati3 
V0.110-K56_ACF_DS2
                    
ati4 Motorola ModemSURFR 56K 
External
                    
ati6 RC56DPF Rev 47BA
Is this the latest firmware from Motorola?
What is the latest "working" revision from Motorola?
Do I need a change the modem firmware to get the connections greater then 33.6K?
If, where to get the new firmware.