SBM powered by Microsoft Lync™ Administrator's Guide 2011-11

6-9
Troubleshooting
Implement a Loopback
Enable Master Clocking
If you connected the port to a loopback connector or to another E1/T1/J1 port,
the port that you are testing must act as the master clock. If you are connecting
the port to the Telco, talk to your carrier and ask whether your port should be
the master clock.
Follow these steps to enable master clocking:
1. Open the Driver properties window:
a. Open the Device Manager from the Control Panel.
b. Expand Sangoma Communication Devices.
Figure 6-6. Remote Desktop—Device Manager
c. Double-click the hardware abstraction driver for your interface’s port
number. For example, you have an A101 PCIe card, which has one
port, so you double-click Sangoma Hardware Abstraction Driver (Port 1).
2. Click the Line Configuration tab.
3. For Clocking, select Master.
4. Click OK.