You want to enable the Low Speed Connection "LSC" in SAP GUI 7.10 .
Create the "administration" key in branch:
HKEY_CURRENT_USERSoftwareSAPSAPGui
In branch HKEY_CURRENT_USERSoftwareSAPSAPGuiadministration of the Windows registry create a entry "WAN" (string value) with value 1 to enable the Low Speed Connection feature. Please note this will enable Low Speed Connection for all systems.
If your require to enable LSC for a specific system only, you have the possibility to change the SAPLogon.ini file with value 1 for a specific Item (system ID)
For example:
[LowSpeedConnection]
Item1=0
Item2=0
Item3=0
Item4=1 <--- LSC enabled.
Item5=0
Item6=0
Item7=0
Item8=0