Welltech ePBX80 V.1.1 - Manual (Page 110)

Welltech Technology Co., Ltd. 110
We suggest you to set up the DialPlan to [ext+allroute]. That means the call from HQ can use all
the resource of Branch.
Step3: Register to each other
 In HQ, register to Branch as follows. Remember to set up the Realm as well.
 In Branch, register to HQ as follows. Remember to set up the Realm as well.