News Flashes

This page provides flashbacks to an earlier  Hekimian time. Items below were retrieved from some old Hekimian websites.

If you have a news item that would interest the group please send an email to jsrock24@gmail.com

Model 3560 Digital Loop Carrier Remote Test Unit

• Tests through NGDLC systems
• Tests special services analog data, digital data, and VF circuits
• Uses TL1 commands
• Compatible with REACT 2001

Hekimian has introduced the Model 3560 Digital Loop Carrier Remote Test Unit to provide comprehensive special services test capabilities for circuits connected through remote terminals of Next Generation Digital Loop Carrier (NGDLC) systems. Next Generation Digital Loop Carrier systems appear in more and more central offices and remote locations providing high circuit density and flexibility for traditional plain old telephone service (POTS) and for special services circuits. Once an NGDLC goes in, you need a way to test metallic special services circuits in the subscriber loop.

The Model 3560 tests special services analog data and VF circuits. Control of the Model 3560 is over an asynchronous (or optional synchronous X.25) connection using TL1 commands or with a TL1-compatible operations support system such as REACT 2001.
You can also use the local craft interface to control the unit. The NGDLC provides access to the circuit under test; the Model 3560 is collocated with the NGDLC remote terminal and can use the NGDLC's own channels for communications.

The Model 3560 provides a single test access path (4-wire or 6-wire) to the metallic test access unit in the NGDLC. Once access is gained to the circuit (2-wire, 4-wire, or 6-wire), the Model 3560 can perform many different tests and measurements including peak-to-average ratio, envelope delay, intermodulation distortion, jitter, transients, impulse noise, and return loss. It can also measure capacitance, current, voltage, resistance, noise, level, and frequency. The Model 3560 can send various test tones ranging from 50 Hz to 120 kHz over the circuit. The Model 3560 also provides a single, 2-wire talk/monitor line.

The Model 3560 provides a full selection of signaling and supervision options in the test and nontest directions. The signaling types are loop, DX, SF, and EM. A variety of supervision functions support dialing and ringing on the circuit. The Model 3560 supports call progress detection to verify wink, dial tone, reverse battery, and other conditions.

The Model 3560 is a compact unit that contains four required circuit cards and up to two optional cards. Optional cards include a communications controller card and modem card (for 2.4 or 9.6 kbps synchronous or asynchronous communications). The chassis takes up only 5.25 inches of vertical space in 23-inch racks

Model 3219A Metallic Access Remote Test Unit

• Replaces SMAS RTS-5A Remote Test System on a plug-for-plug basis
• Allows direct interface and control of SMAS 5A/5B components
• Provides TL1 interface to embedded SMAS equipment
• Provides VF, analog, data, multimeter, and DDS testing capabilities

Hekimian supports the industry goal of a standard interface to remote test and access units by providing a TL1 interface to your embedded base of AT&T Switched Maintenance Access System (SMAS) equipment. The Model 3219A Metallic Access Remote Test System (MARTS) is a combination interface/test shelf that controls existing SMAS network elements through TL1 commands and provides special services testing.

Designed as a plug-for-plug replacement for an AT&T RTS-5A Remote Test System, the Model 3219A supports up to 16 simultaneous tests. The Model 3219A replaces the RTS-5A controller, remote test port panels (RTPPs), enhancement shelf for data testing, and other common SMAS equipment. An internal test system controller performs all required test resource allocation and management functions. Existing JKL access panels and their control units are fully supported.

The Model 3219A has been designed to easily replace an existing RTS-5A system. Installation entails simply removing all 25-pair connections from the RTS-5A and RTPPs and connecting them directly to the Model 3219A shelf. Conversion from the RTS-5A to the Model 3219A in a typical office requires only hours, retains the embedded SMAS access equipment, and saves expensive installation and engineering costs.

All maintenance connectors and controllers, distribution networks, and other access elements can be left in place while deploying a new TL1-compatible integrated test operations support system such as Hekimian's REACT 2001. The OSS controls the Model 3219A shelf through a synchronous X.25 interface or an asynchronous RS-232 interface. Application firmware upgrades for the Model 3219A can be downloaded remotely from the Hekimian factory or through a REACT 2001 system or personal computer.