5.3 Analog Interfaces
This section describes how to connect the device to analog equipment.
5.3.1 Connecting FXS Interfaces
The procedure below describes how to cable the device's FXS interfaces.
Warnings:
• The device is an INDOOR unit and therefore, must be installed only indoors.
• FXS port interface cabling must be routed only indoors and must not exit the
building.
• Make sure that the FXS ports are connected to the appropriate, external devices;
otherwise, damage to the device may occur.
• FXS ports are considered TNV-2.
Notes:
• FXS interface is a customer-ordered item.
• FXS is the interface replacing the Exchange (i.e., the CO or the PBX) and connects to
analog telephones, dial-up modems, and fax machines. The FXS is designed to
supply line voltage and ringing current to these telephone devices. An FXS VoIP
device interfaces between the analog telephone devices and the Internet.
Cable specifications:
Cable: Standard straight-through RJ-11-to-RJ-11 telephone cable
Connector Type: RJ-11
Connector Pinouts:
Figure 5-6: RJ-11 Connector Pinouts for FXS Interface
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