T1 ESF CSU ACE

Appendix D. Glossary

 

 

DTE

data terminal equipment. The end-user terminal or computer that plugs into the termination point (DCE) of a communications circuit. The main difference between the DCE and the DTE is that pins two and three are reversed.

encapsulation

A process by which an interface device places an end device’s protocol-specific frames inside a frame rely frame. The network accepts only frames formatted specifically for frame relay; therefore interface devices act- ing as interfaces to a frame relay network must perform encapsulation. See also interface device or frame relay capable interface device.

end device

The ultimate source or destination of data flowing through a frame relay network sometimes referred to as DTE. As a source device, it sends data to an interface device for encapsulation in a frame relay frame. As a des- tination device, it receives de-encapsulated data (i.e., the frame relay frame is stripped off, leaving only the user’s data) from the interface device.

FCS

frame check sequence. The standard 16-bit cyclic redundancy check used for HDLC and frame relay frames. The FCS detects bit errors occurring in the bits of the frame between the opening flag and the FCS, and is only effective in detecting errors in frames no larger than 4096 octets. See also CRC.

FDL

facility data link. A 4 bit/s non-disruptive management channel provided in ESF framing mode. This data link conforms to ANSI T1.403 and AT&T TR 54016 specifications.

FECN

forward explicit congestion notification. A bit set by a frame relay network to notify an interface device (DTE) that congestion avoidance procedures should be initiated by the receiving device. See also BECN.

file server

In the context of frame relay network supporting LAN-to-LAN communications, a device connecting a series of workstations within a given LAN. The device performs error recover and flow control functions as well as end-to-end acknowledgment of data during data transfer, thereby significantly reducing overhead within the frame relay network.

frame-relay-capable interface device

Acommunications device that performs encapsulation. Frame-relay-capable routers and bridges are examples of interface devices used to interface the customer’s equipment to frame relay network. See also interface device and encapsulation.

frame relay frame

A variable-length unit of data, in frame-relay format that is transmitted through a frame relay network as pure data. Contrast with packet. See also Q.922A.

frame relay network

A telecommunications network based on frame relay technology. Data is multiplexed. Contrast with packet switching network.

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© 2004 ADTRAN, Inc

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T1 ESF CSU ACE specifications

The ADTRAN T1 ESF CSU ACE is a robust and essential device designed for the efficient transmission of data over T1 lines. As a Channel Service Unit (CSU) and Digital Service Unit (DSU) in one, it meets the needs of service providers and businesses that require reliable communication. This powerful device offers a seamless connection between customer premises equipment (CPE) and the public switched telephone network (PSTN).

One of the main features of the ADTRAN T1 ESF CSU ACE is its support for both T1 and E1 line formats, making it versatile for different telecommunications environments. The unit comes with advanced error correction capabilities, which significantly minimize errors during data transmission, ensuring high-quality service. The application of Extended Superframe Format (ESF) further enhances the error detection capability, thus providing greater reliability and service availability.

The CSUs in the ADTRAN T1 ESF CSU ACE are designed with integrated diagnostics that allow users to monitor real-time network performance. Features such as loopback testing and local/remote diagnostics help technicians quickly identify and troubleshoot issues, which saves time and reduces disruptions. The built-in LED indicators give immediate status updates on power, alarms, and line integrity, allowing for ease of use and management.

In terms of scalability, this CSU can accommodate growing business needs with its flexible configuration options. Users can manage and configure the device through an intuitive command line interface (CLI), making it accessible for network administrators of all levels. Furthermore, the unit typically supports full duplex operations, enabling simultaneous transmission and reception of data, which optimizes network efficiency.

The ADTRAN T1 ESF CSU ACE also adheres to industry standards, ensuring compliance with various network requirements. It includes surge protection and ensures a robust design that is suitable for deployment in diverse environments, from small offices to larger enterprise networks.

In conclusion, the ADTRAN T1 ESF CSU ACE stands out as a reliable, feature-rich solution for businesses requiring T1 connectivity. With its combination of high performance, robust diagnostics, and comprehensive error correction, this device is an essential component for ensuring efficient and uninterrupted communication in today's digital landscape.
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