Installation guide

MyPBX U520 Installation Guide
http://www.yeastar.com 9/14
Figure 3-3 Connection of FXO ports
3. Connection of GSM/UMTS ports
If No.3 and No.7 connectors are GSM/UMTS Ports, the steps of connection are as below:
Step 1: Open the Upper case of MyPBX U520
Step 2: Insert the SIM card:
Figure 3-4 Inserting the SIM Card
Step 3: Connect the antenna
Once completed, the No.3 and No.7 LED lights would turn red as below figure:
Figure 3-5 Connection of GSM/UMTS ports