5.3.2 Remote Digital Loopback (RDL)

The Remote Digital Loopback (RDL) test checks the performance of both the local and remote Model 2500RC Series',and the communication link between them. Any characters sent to the remote Model 2500RC Series in this test mode will be returned back to the originating device. For example, characters typed on the keyboard of the local terminal will appear on the local terminal screen after having been passed to the remote Model 2500RC Series and looped back (see Figure 12, below).

CSU/DSU

Digital Network

Figure 12. Remote digital loop

RDL Test Activation

The RDL test may be activated in one of three ways:

1)Toggle the front panel “Local/Normal/Remote” switch to the left hand side to the “Remote” position.

2)Activate the RL lead from the DTE (Note: in order to use this option, the DTE Loop Control option must be enabled–see Section 3.2.4). If you are not sure which pin is the RL lead, please refer to the pinout diagrams in Appendix D.

3)From a terminal, first go to the Main Menu and select item 3 to display the Software Switch Menu (Section 3.2.4) In the Software Switch Menu, select item “d” to go to the Set Remote Digital Loop Menu (see below). To activate RDL, select item 1.

RDL Test Procedure

Once LAL is activated, the “Test” LED should be lit. Perform a BER (bit error rate) test on the system, using BER testers on both ends. If the BER test equipment indicates a fault and the Local Analog Loopback test was successful for both Model 2500RC Series units, you may have a problem with the line between the CSU/DSUs. You should inspect the line for proper connections.

5.3.3 Telco Testing

The digital service provider’s central office can perform CSU Loop and DSU Loop diagnostic testing. These diagnostics allow the central office to evaluate circuit operation without making visits to a customer’s premises.

CSU Loop

The CSU Loop is activated when the central office reverses the DC sealing current that flows between the TX pair and the RX pair. In this case, the Model 2500RC Series recognizes this and loops signals on the RX pair back to the central office on the TX pair (see Figure 13, below). While the CSU Loop is activated by the central office, the TM light is illuminated.

DSU

CSU

Digital Network

Figure 13. CSU loop

DSU Loop

The DSU Loop is activated when the central office sends a DSU loop signal over the twisted pair wire. The Model 2500RC Series senses this signal and loops the digital data back to the central office (see Figure 14, below). While the DSU Loop is activated, the TM light is illuminated.

DSU CSU

Digital Network

Figure 14. DSU loop

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Patton electronic 2520RC Remote Digital Loopback RDL, RDL Test Activation, RDL Test Procedure, Telco Testing, CSU Loop
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2510RC, 2500RC, 2520RC specifications

The Patton Electronics 2520RC, 2510RC, and 2500RC are versatile remote access devices designed to facilitate secure and efficient communication for various applications. These models are recognized for their robust performance, scalability, and advanced technology, making them ideal for industries such as telecommunications, information technology, and remote monitoring.

The Patton 2520RC is renowned for its dual Ethernet port functionality, supporting both LAN and WAN connections. This feature ensures seamless data transfer and allows for the integration of multiple devices within a network. The device supports a range of protocols including TCP/IP, allowing for compatibility with various network environments. Robust security features, including VPN options, ensure that data transmissions remain secure and protected against unauthorized access. Additionally, the 2520RC is equipped with advanced monitoring and management capabilities that enable network administrators to keep track of performance metrics in real-time.

Moving to the 2510RC, this device is particularly well-suited for applications requiring voice over IP (VoIP) functionality. It supports a variety of codecs, enabling high-quality voice communication over data networks. The 2510RC also includes features for echo cancellation and noise reduction, ensuring clarity during VoIP calls. Its integration capabilities allow it to work seamlessly with existing telephony systems and provides flexible connectivity options to adapt to different business needs.

The 2500RC is the entry-level model of this series, designed with simplicity and effectiveness in mind. It features one Ethernet port and is particularly suitable for smaller networks or remote locations. Although it has fewer advanced features compared to its siblings, the 2500RC maintains reliability and functionality crucial for basic communication needs. Its compact design makes it easy to deploy in tight spaces, and its ease of installation means that users can be up and running quickly without extensive configuration.

All three models incorporate Patton’s commitment to high-quality manufacturing and customer support. They are built to withstand harsh conditions, ensuring durability for long-term use. Featuring power over Ethernet (PoE) support, these devices can simplify installation by reducing the need for additional power sources.

In summary, the Patton Electronics 2520RC, 2510RC, and 2500RC offer a range of features and technologies designed to meet various remote access and communication needs. Their versatility, combined with robust security measures and easy management tools, make them top choices for businesses looking to enhance their connectivity solutions.
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