GL Announces STM-1 Mux and Traffic Capture / Analysis (63 E1 over STM-1 Multiplexer)

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GL Communications Inc. announced today the release of its latest product STM-1 Mux - a product that multiplexes and demultiplexes 63 E1 signals to and from an optical STM-1 stream.

STM 1 Mux

STM-1 Mux multiplexes and demultiplexes 63 E1 signals to and from an optical STM-1 stream.

GL Communications Inc. announced today the release of its latest product STM-1 Mux- a product that multiplexes and demultiplexes 63 E1 signals to and from an optical STM-1 stream. Addressing a press conference, Mr. Vijay Kulkarni CEO of the company said, “STM-1 Mux is a cost-effective (inexpensive), compact, only 1U high, SDH (Synchronous Digital Hierarchy) multiplexer designed for applications in metro and access networks for efficient transport of traditional TDM and emerging data traffic. It provides 63 E1 TDM interfaces in only 1U standard 19" platform. Applications include SDH TDM point-to-point network transmission and switching. It can be used in various network topologies such as point-to-point, chain, ring, hub, and mesh networks.”

He explained, “As shown in the STM-1 Mux picture, the STM-1 Mux multiplexes 63 E1 signals into a STM-1 stream, with TU-12 cross-connect capability. As a standard and compact SDH TDM device, the STM-1 multiplexer is best suited to applications where high-density E1 ports are required to interface with an SDH network through STM-1 fiber optic connections. The device can be managed either through the embedded DCC channel within the STM-1 signal, or through the local RJ-45 management interface on the equipment panel. When multiple 63 E1 over STM-1 multiplexers are stacked together, an RS-485 bus may be used to link the units to form a single managed object. There are also alarm indication lights and a LCD screen on the panel for operation monitoring.”

Mr.Kulkarni further explained, “Shown in the Dua Quad Octal Picture is a typical application with GL’s Dual, Quad, and Octal E1 Cards. Both directions of an STM-1 signal are received non-intrusively from a satellite link and then demultiplexed by the STM-1 Mux. The E1s are then fed to GL’s E1 Cards for framing and access to voice timeslots. All 126 simplex E1s (63 duplex E1s) can be analyzed, recorded, or heard (126 x 30 = 3780 timeslots).”

He added, “This architecture is not only very compact, but also quite inexpensive especially with GL’s Octal E1 Cards.”

Important Features:

•Cost effective access to all 63 E1’s in an STM–1 optical signal; two (2) are required to non-intrusively access both directions of the optical signal
•Standard 63 E1 Mux Configuration for point to point applications
•1U height, 19" rack mount size, high integration, compact design
•Topologies supported include point to point, chain, ring, hub, and mesh
•ADM (Add Drop Mux) function is NOT included
•Optional 2 STM -1 optical interfaces for protection switching - one redundant, one online
•Optical interface supports ALS (Auto Laser Shutdown) function
•Inter-works with popular SDH products of various vendors – Motorola, Lucent, and Huawei
•Supports TUG3-TUG2-TU12 tributary channel numbering and time slot numbering
•Supports internal, STM-1 line clock, external and tributary clocking modes
•LCD display for system configuration and alarm
•Supports remote power-off alarming function
•Supports online upgrading
•Easy commissioning and maintenance, high reliability

About GL Communications Inc.,

Founded in 1986, GL Communications Inc. is a leading supplier of test, monitoring, and analysis equipment for TDM, Wireless, IP and VoIP networks. Unlike conventional test equipment, GL's test platforms provide visualization, capture, storage, and convenient features like portability, remotability, and scripting.

GL’s TDM Analysis & Emulation line of products includes T1, E1, T3, E3, OC-3, OC-12, STM-1, STM-4, analog four-wire, and analog two-wire interface cards, external portable pods, and complete system solutions. Capabilities include voiceband traffic analysis and emulation across all traffic types (voice, digits, tones, fax, modem), all protocols (ISDN, SS7, GR-303, Frame Relay, HDLC, V5.X, ATM, GSM, GPRS, LTE, etc.), and with capacities up to thousands of channels. Our newest products provide astonishing capacity and capture capability up to and including gigabit speeds.

GL’s VoIP and IP products generate / analyze thousands of calls and traffic simultaneously with traffic types such as frames, packets, voice files, digits, video, tones, noise, and fax. Almost all codecs are supported including G.711, G.729, AMR, EVRC-A,B,C, GSM, iSAC, and many more. Additional features include visual analysis, real-time listening, and recording. The product line also includes Ethernet / IP Testing capability that simulates and checks frame transport and throughput parameters of Ethernet and IP networks, including delay, errors and other impairments.

GL's Voice Quality Testing (VQT) product line complements all of GL's products. Using ITU-standard algorithms (PAMS, PSQM, and PESQ), GL's VQT provides a widely accepted solution for assessing voice quality in the telecom industry. Voice Quality Testing across multiple networks (T1, E1, T3, E3, OC-3, OC-12, VoIP, Wireless, and Landline) are all available.
GL’s Wireless Products perform protocol analysis and voice quality assessment on GSM, CDMA, UMTS, and LTE networks. Connections can be made to any wireless phone with automated call control, GPS mapping and real-time signal measurements.

GL’s Echo Canceller testing solutions provide the broadest range of simulation and analysis, including line and acoustic echo. GL’s compliance testing per G.168. G.167 and P.340 across TDM, IP, VoIP and Wireless networks is widely accepted in the industry.

GL’s wireless VQT solutions help assessing impairments to voice quality such as poor mobile phone quality, voice compression and decompression algorithms, delay, loss and gain in speech levels, noise, acoustic and landline echo, and other distortions are easily assessed and accurately measured.

GL’s Handheld data testers can test a wide variety of communications facilities and equipment including T1, fractional T1, E1, fractional E1, T3 and E3 modems, multiplexers, CSU, DSUs, T1 CSUs, DTUs, NTUs and TIUs and more. The testers provide convenience, economy, and portability for almost any interface, including RS232, RS-422, RS-530, X.21, T1, E1, T3, E3, and many others.
GL’s Network Surveillance and Monitoring products include Probes for TDM, IP, VoIP, ATM, and Wireless networks. An open standards based approach provides a scalable, feature rich, real-time access to network characteristics. Centralized or distributed access, efficient transport and database loading allow compatibility with 3rd party and standards based monitoring systems.


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Mr.Shelley Sharma

Gururaj S D