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GE Vernova offers a wide range of transformer solutions for the utility, industrial, commercial, residential and energy markets. These solutions feature flexible, reliable and robust designs to support a wide range of applications. With units operating in some of the most demanding electrical environments around the world, GE Vernova designs and delivers transformer solutions that provide among the highest level of performance and reliability to meet rigorous operating requirements.

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Our technical experts are ready to equip customers with the knowledge needed to effectively manage their critical assets and systems, and increase their return on product investments. Our training courses are offered in a variety of ways, including online, onsite at customer locations, and in our state-of-the art training centers around the world.

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 Grid Solutions  Communications   STM 16 Aggregate Unit
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STM-16 Aggregate unit
STM-16 Aggregate Unit
The STM-16 Aggregate Unit provides SDH security and performance guarantees for the distribution of voice, data, specialty teleprotection and E1 TDM services, as well as 10/100/1000 Mb/s Ethernet WANs. The unit’s simple, flexible and economical design supports optical reach choices up to 120 km, as well as hot swappable capacity upgrades from STM-1 and STM-4 rates. It is hardened to IEC 61850-3 electrical utility specifications and due to low power consumption permits reliable fanless convection cooling of TN1U/TN1Ue SDH Multiplexer nodes.

Description
The STM-16 Aggregate unit, as part of the field proven TN1U and TN1Ue digital transport and access systems supports the complete product family feature set, including integrated network management and synchronous 64 kb/s tributaries.

By using the STM-16 Aggregate unit, the add and drop capacity of a node can grow as required in modular steps of virtual containers (VC-12, VC-3, VC-4, VC-4-4c), up to the full STM-16 SDH payload.

The unit has five configurable bandwidth (CBW) service distribution ports. Three CBW ports can support up to 12 TUG-3s, while two CBW ports can support up to 24 TUG-3s, or an equivalent capacity of VC-4 and VC-4-4c virtual containers.

The CBW ports are integrated with built-in low order and high order cross-connects, supporting both add/drop and hairpin applications. This provides a flexible traffic engineering solution to mixed service requirements.
Key Features and Benefits

Functions as a SDH STM-16 add and drop multiplexer, providing flexible payload access to VC-11/VC-12, VC-3, VC-4 and VC-4-4c virtual containers.

- Both narrowband and broadband multi-protocol service requirements can be economically addressed
- Mix of 64 kb/s voice, data and teleprotection; E1, as well as Video and 10/100/1000 Mb/s Ethernet
WAN services can be effectively integrated

Supports sub-network connection protection (SNCP) ring, multiple rings and spurs, as well as linear system topologies

- Guarantees maximum network deployment flexibility

1310 nm or 1550 nm Small Form Factor Pluggable (SFP) optical transceiver options

- Provides cost effective alternatives for fibre optic cable spans up to 120 kms (75 miles)
- Updated optical performance monitoring available through intelligent Digital Monitor Interface

Offers VC-12, VC-3, VC-4, VC-4-4c hairpinning

- Cost effective traffic tie between subtended STM-1, STM-4 or STM-16 TN1U rings
- Additional add and drop options provided at subtended ring tie sites

Two user configurable traffic images stored in FLASH non-volatile memory

- Supports VistaNET Alternate Traffic Routing (ATR) network management feature for critical outage
response.
- Configuration parameters maintained after a loss of power.
- Configuration data not lost during firmware upgrades.

Compatible packaging with STM-1 and STM-4 Aggregate units

- Simple migration from STM-1 or STM-4 to STM-16 system capacity, via Aggregate unit substitution
Local or remote unit configuration, performance monitoring and diagnostics with Windows-based PC
- Allows simple installation, ongoing management and maintenance of unit without expensive
workstations

Front panel LED status indicators

- Permit quick visual confirmation of a working unit, as well as effectively pinpointing the probable
causes of various unit alarm conditions.

Built-in test capabilities

- No costly SDH test instruments required.

Low power consumption

SDH for dependable Ethernet transport
Ethernet over SDH (EoS) is a natural technology choice for critical packet-based applications. EoS through its intended design by the telecommunications industry, has a low latency forwarding mechanism in addition to offering guaranteed traffic accessibility and isolation within a dedicated portion of the payload. Additionally, SDH provides the framework for extremely high network availability with tightly controlled timing, fast protection switching and fault isolation for each independent connection, of which a wide range of payload types are supported.
Technical Specifications
Optical Interface ( STM-16 )
Connector: LC, transmit and receive fibres
System Gain (singlemode fibre):
@ 1310 nm: min. 13 dB, IR-1
Intermediate reach - up to 15 km,
@ 1310 nm: min. 26 dB, LR-1
Long reach - up to 40 km
@ 1550 nm: min. 26 dB, LR-2
Extra long reach - up to 80 km
@ 1550 nm: min. 31 dB, LR-2
Extra long reach - up to 120 kms
Optical Line Rate
2.488 Gb/s
Line Code
NRZ
Transport Capacity
1008 x VC-12
48 x VC-3
16 x VC-4
4 x VC-4-4c
Cross-connect Capacity
126 x 252 VC-12 and 48 x 84 TUG-3 add/drop TSI
16 x 28 VC-4 and 4 x 7 VC-4-4c add/drop TSI
105 x 126 VC-12 and 48 x 60 TUG-3 hairpin TSI
16 x 20 VC-4 and 4 x 5 VC-4-4c hairpin TSI
Multi-protocol Service Access
Three TIF ports support up to 21 x TU-12.
Five CBW ports, each supports up to 12 or 24 x TUG-3 capacity; mix of VC-12, VC-3, VC-4 and VC-4-4C virtual containers.
Configurations Supported
Dual fed SNCP ring, per ITU-T Recommendation G.841
Two fibre linear systems
Multiple TN1U rings plus spurs
TN1U/TN1Ue ring ties via TU-12 and CBW ties
Environmental - General
Operating Temperature: -10° to +60° C (+14° to +140° F)
Storage Temperature: -40° to +70° C (-40° to +158° F)
Humidity: 5-95% non-condensing
Shipping Altitude: 15,000 meters (50,000 ft.)
Shock and Vibration:
Earthquake Risk Zone 4
Vibration (transit) : MILS-STD810E
Bench handling: TS 1-00446.06
STM-16 Aggregate Unit