Alcatel-Lucent 500-1113-212 Rev D Channel Bank Assembly – In-Depth Description
The Alcatel-Lucent 500-1113-212 Rev D Channel Bank Assembly, also referenced with assembly number 300-1250-900, is a versatile digital multiplexer designed for interfacing analog and digital subscriber lines with T1/E1 digital trunks. This channel bank is a staple in telecom central offices and enterprise wiring closets, providing cost-effective conversion of up to 24 (T1) or 30/32 (E1) channels of voice or data into a single digital stream. Its modular architecture allows flexible configuration for loop start, ground start, or E&M signaling.
The assembly is housed in a rugged 19-inch rack-mountable chassis, measuring 5.25U in height. It includes a backplane with slots for up to four line interface modules, each supporting up to 6 channels, and a main controller card that handles framing, signaling, and management. The Rev D designation indicates an enhanced version with improved DSP performance and support for both D4 and ESF framing (T1) or CRC4 (E1), as well as extended temperature operation.
Each channel can be independently provisioned for voice (PCM encoding with μ-law or A-law) or data (synchronous up to 56/64 kbps). The board includes built-in codec/filters and gain adjustment for analog ports, while digital ports support V.35, RS-232, or RS-449 interfaces via optional daughter cards. The channel bank also supports fractional T1/E1 service, allowing subsets of DS0s to be bundled for data applications.
Test and diagnostic features are comprehensive. The front panel provides a 2x16 LCD display and keypad for local configuration and monitoring. Test access jacks allow insertion of test signals without disturbing live traffic. The channel bank supports loopback tests at the line, channel, and unit levels, simplifying fault isolation.
Power supply is dual-redundant, with two pluggable AC/DC converters that automatically share load and switch over on failure. The unit operates on 110/220 VAC or -48 VDC, with hot-swappable power modules. Cooling is provided by a rear-mounted fan tray with speed control based on internal temperature sensors.
Synchronization is derived from either an internal oscillator (Stratum 3) or an external reference (1.544 MHz or 2.048 MHz) via a BNC connector. The system can be configured as master or slave for network timing, with holdover capability of less than 1.0 E-8 over 24 hours.
Management is supported through SNMP, a serial RS-232 craft port, and a built-in web server (HTTP). The channel bank provides detailed performance monitoring including error second, severely errored second, and unavailable second counts, aligned with G.826 and G.821 standards.
Compliance includes FCC Part 68, UL 60950-1, and NEBS Level 2. The assembly is RoHS compliant and carries CE marking for European markets. Its MTBF is rated at 80,000 hours for the main chassis.
Typical applications include connecting legacy PBX systems to digital trunks, aggregating remote analog lines to a digital loop carrier, and providing test access for circuit maintenance. The 500-1113-212 channel bank is a reliable and flexible solution for migrating legacy circuits to digital transport.
In summary, the Alcatel-Lucent 500-1113-212 Rev D Channel Bank Assembly offers a proven, feature-rich platform for T1/E1 channelization, with robust diagnostics, redundant power, and broad interface support. Its long service life and field-proven design make it a trusted component in telecommunications infrastructure.
