IF YOU WANT TO DO PTMP connection, just short press reset of Master CPE and several Salve CPE in one minutes, they will auto paired 

Press Reset button both side in 1 minutes(click Master CPE first,then click some Slave CPE one by one) 

for Master CPE, you need choose AP mode

for Slave CPE, you need choose repeater mode, then scan Master CPE's SSID to conenct

you need modify second Slave CPE and  third Slave CPE IP address from default value to 192.168.1.X(X can not be 88 or 89)