CASE STUDY:

Timeslot Grooming E1 Multiplexer

Project Description

This specific E1 Timeslot Grooming (TSG) Multiplexer (MUX) was design for a customer who had a specific niche MUX application. The primary goal of the MUX is to grab the signalling timeslots from 32 incoming E1 lines and groom them up to 4 outgoing E1 lines. This enables operators who use E1 lines to carry data with CCS signaling to perform centralized protocol analysis without having to physically tap onto the line they are interested in.

Upgrade Path

The current configuration of the MUX allows it to be a 32 to 4 uni-directional multiplexer, but the hardware and software has been developed in such a way as to easily upgrade the configuration to a 32 to 4 bi-directional operation or even to a full 32 to 32 bi-directional grooming MUX.

Flexibility

The multiplexer consist of a rack with a minimum of 2 and a maximum of 4 multiplexing cards all interconnected on a common backplane. The MUX can be configured through either a Telnet IP session or a USB or RS232 Serial terminal session. The timeslot configuration for the whole MUX is duplicated and stored in the flash memory of each card, thus preserving the MUX configuration when cards are swapped out or replaced in the rack.

Successful Field Trials on GSM network

The Keystone Electronic Solutions TSG MUX has been successfully field trialled by our client with a South African GSM network operator.