STM-1 Mux and Traffic Capture/Analysis
(63 E1 over STM-1 Multiplexer)
Overview
STM-1 Mux is a cost-effective, compact (only 1U high), SDH (Synchronous Digital Hierarchy) multiplexer that is 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. It is applicable for 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.
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.
Typical Application with GL's Dual, Quad, and Octal E1 Cards
Shown 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 these signals are 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 E1s can be analyzed, recorded, or listened (126 x 30 = 3780 timeslots).
Capture and Analysis Application
Shown below is a typical application with GL's other products
- MultiLink PPP (MLPPP) Emulator
- Inverse Multiplexing over ATM (IMA) Protocol Emulation
- MultiLink Frame Relay (MFR)
- Central Office Switching Simulation (PSTN, TDM, IP Networks)
STM-1 Mux with other GL applications
Main 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 (see diagram below)
- 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
Typical Applications
TUG3-TUG2-TU12 Tributary Channel Numbering
There are several 63 E1 mappings into and from an STM-1 signal. The STM-1 Mux supports all possibilities, including Motorola, Huawei, and Lucent.
TUG3-TUG2-TU12 Tributary Channel Numbering
Technical Specifications
STM-1 Mux Equipment
STM-1 Fiber Optic Port
| SDH Interface | |
|---|---|
| Max | 1 or 2 STM-1 optical interfaces (1+1 protection supported) |
| Bit Rate: | 155.520 Mbit/s±4.6 ppm |
| Line Code: | Scrambled NRZ |
| Protection: | Unidirectional 1+1 APS, revertive / non-revertive selectable |
| Wavelength: | Default:1310 nm nominal Option /5:1550 nm nominal |
| Output Power: | Default: Min. -12 dBm Option /L: Min. -5 dBm Option /S: Min. -14 dBm Option /SL: Min. -5 dBm |
| Sensitivity: | Default:-36 dBm Option /S:-30 dBm |
| Max Input Power: | -3 dBm |
| Connector: | Default:SC Option /F: FC Option /S: SC |
| Spec | S-1.1, L-1.1, L-1.2 Single fiber bi-directional interface can be optionally supported |
| Clock Source | Internal, STM-1 Line, External, Tributaries |
| Physical/Electrical | |
|---|---|
| Dimensions | 44 mm x 230 mm x 440 mm (H/D/W) 1U: 440 * 44 *230 (mm) |
| Net weight | 3 kg |
| Power (AC) (63 E1 over STM-1 multiplexer only): | 100 to 240 V 50/60Hz |
| Power (DC) | -48 V (-58 V to -38 V) or 220 V (110 V) AC or dual power supply +24V DC |
| Power consumption | </= 15 Watts |
| Redundancy (63 E1 over STM-1 MultiplexerRP only): | Dual -48 V DC inputs, dual internal power conversion modules |
| Temperature | 0 to 50° C |
| Humidity | 0-95% RH (non-condensing) |
| LAN port | RJ-45 |
| RS-485 port | DB-9 |
| E1 interface connector | RJ-45 |
| Optical Interface connector | FC or SC |
| Number of Optical STM-1 Ports | 1 or 2 (second for protection) |
| Number of E1 channels | 63 |
| LCD Display | Supported |
| PDH interface E1 Port | |
|---|---|
| Bit Rate | 2.048 Mbps ±50 ppm |
| Line Code | HDB3 |
| Impedance: | 75Ω coax/120Ω twisted pair |
| Framing | Unframed |
| Connector | RJ-48 (special wiring for two E1s) |
| Total Channels | 63 E1s |
| Management Port | |
|---|---|
| Interfaces | 10Base-T and RS-485 |
| Ethernet: | RJ-45, 10Base-T adopts MDI port |
| RS-485 | Four-line RS-485, default baud rate 2400 (1200, 2400, 4800, 9600, 19200, 38400 selectable), data bit: 8; stop bit: 1; parity: odd; TABS protocol Asynchronous RS-485 data |
| Protocol | SNMP or Q3 |
| Standards Compliance |
|---|
| G.703, G.707, G.781, G.783, G.784, G.798, G.803, G.811, G.813, G.823, G.825, G.826, G.841, G.957 |
Resources
| Item No. | Item Description |
| SME063 SME063D |
STM 1 Multiplexer / Demultiplexer w/ 1:1 Fiber Protection |
| Related Hardware | |
|---|---|
| LTS100 | Lightspeed1000™ - Dual OC-3/12 STM-1/4 PCIe Card |
| LTS105 | Lightspeed1000™ - Portable Dual OC-3/12 STM-1/4 USB Unit |
| FTE001 |
|
| ETE001 |
|
| PTE001 | tProbe™ Dual T1 E1 Laptop Analyzer with Basic Analyzer Software |
| XTE001 | Dual Express (PCIe) T1 E1 Boards |
Specifications are subject to change without notice.