Digital ATM 4-Port Modular Line Card DAGGL-BB

This document serves as a critical guide for the installation and use of the DIGITAL ATM 4-port modular line card (DAGGL-BB) with various ATM modular PHY (modPHY) cards. It describes the DAGGL-BB as a logic module that supports a range of ATM connections, including STS-3c (155 Mb/s) fiber and twisted-pair, T3/E3 coaxial, and E1/T1 twisted-pair. The document details that the line card performs ATM cell-forwarding, implements four ports, and connects them to a crossbar module, also supporting wide-area networking features.

Key information includes:

• Firmware Requirements: A minimum of V2.5 firmware for the line card and V1.84 for CMM firmware is required, with an emphasis on checking and updating versions from the DIGITAL FTP site or product website. Expanded memory options (DAGME-AA/AB SODIMMs) are often necessary for V2.5.
• Installation: Instructions are provided for installing and removing expanded memory SODIMMs and the appropriate DC-to-DC power modules (DAGPL-AB for 48V systems, DAGPL-AA for 5V systems), which must be installed before the line card itself.
• Testing and Diagnostics: A significant portion details how to evaluate the module self-test (MST) and diagnose issues using the line card's LEDs. It explains the meaning of the Module LED, Link LEDs, and PHY LEDs in different states (e.g., off, flashing green/amber, solid green/amber) to indicate power status, firmware load progress, self-test results, line status, and end node type. Tables are provided to interpret specific LED patterns for firmware loading and self-test failure diagnostics. A simple loopback test procedure is also described.