Chapter 4: Web Configuration

Definitions of FXS and FXO

FXS (Foreign eXchange Subscriber) interface delivers POTS service from the local phone company’s CD and connect to subscriber equipment (e.g., phone, fax, modem.. and so on). That is, an FXS interface will point to the subscriber directly. And FXS interface can provide primary service of dial tone, battery current and ring voltage to a subscriber device.

FXO (Foreign eXchange Office) interface receives POTS service, from a central CO of PSTN. That is, an FXO interface will point to the Telco office directly. And FXO interface can provide primary service of on-hook/off-hook indication to the Telco network device.

The following illustration shows the hardware connection for the FXS and FXO interfaces.

Call procedure of FXS-FXO

The call procedure for FXS and FXO differs for each other. Refer to the following for reference.

 

For the side of FXS:

 

For the side of FXO:

 

 

 

 

z

Initiating a call by

z

Initiating a call by

 

Presenting ring voltage over the

 

Going off-hook to seize the

 

line to the attached FXO device.

 

telephone line and

 

(Notice that the FXS device

 

Dialing the dual-tone

 

cannot pass dialed digits.)

 

multi-frequency (DTMF) digits that

 

 

 

can identify the destination to be

 

 

 

called.

 

 

 

 

z

Receiving a call by

z

Receiving a call by

 

Detecting the line that has been

 

Detecting the ring voltage supplied

 

seized (the attached

 

by the FAX device

 

telephone-FXO device-has gone

 

and

 

off hook)

 

Going off-hook to answer the call.

 

and

 

 

 

Receiving dual-tome

 

 

 

multi-frequency (DTMF) digits

 

 

 

indicating how the call should be

 

 

 

routed.

 

 

 

 

 

 

Notice that the FXS devices will supply DC power to the line.

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Siemens SLI-5310-I IAD Definitions of FXS and FXO, Call procedure of FXS-FXO, For the side of FXS For the side of FXO
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SLI-5310-I IAD, SLI-5310 specifications

The Siemens SLI-5310 and SLI-5310-I Integrated Access Devices (IAD) are advanced telecommunications solutions designed to facilitate efficient connectivity and high-quality voice services over IP networks. These devices stand at the intersection of traditional telephony and modern IP-based communications, offering a robust solution for businesses requiring integrated voice and data services.

One of the main features of the Siemens SLI-5310 is its ability to support multiple communication protocols, making it versatile for various network environments. This device can handle both TDM (Time Division Multiplexing) and VoIP (Voice over Internet Protocol), allowing organizations to transition smoothly from legacy systems to modern IP solutions. The SLI-5310-I variant extends these capabilities further by offering integrated router functionalities, ensuring reliable data transfer alongside voice services.

The SLI-5310 supports a range of interfaces, including analog and digital ports, enabling connection with various telephone types and devices. This flexibility ensures that businesses can leverage their existing telecommunications infrastructure while upgrading to newer technologies. The device is also equipped with advanced echo cancellation and voice compression technologies, improving voice quality and minimizing latency during calls.

In terms of management and monitoring, the Siemens SLI-5310 series comes with a user-friendly interface, which allows administrators to configure and manage settings seamlessly. Built with advanced security features, these IADs protect against potential threats, ensuring that both voice and data communications remain secure. Encryption protocols and support for VPNs (Virtual Private Networks) further enhance the security framework.

In summary, the Siemens SLI-5310 and SLI-5310-I IADs are versatile communications solutions that combine traditional and modern technologies to deliver high-quality voice and data services. With support for multiple interfaces, advanced voice processing capabilities, and robust security measures, these devices cater to the evolving needs of businesses looking for reliable telecommunications solutions. Their ability to integrate seamlessly into existing networks while offering scalability makes them an ideal choice for enterprises aiming to future-proof their communication systems.
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