The PlexStar ADM400 is suitable for use as highly integrated access ADM/MSPP solutions in a compact 1U chassis. It offers two integrated multi-rate 622.08 Mbps (or 155.52 Mbps) SONET/SDH compliant serial interfaces supporting STM-4/1 or OC-12/3 links, add-drop of 21-E1s or 28-T1s, and 8 Fast Ethernet (FE) or 1 GE (Copper/Fiber) for PDH T1/E1, and Ethernet over SDH/SONET. It contains 2.5G non-blocking memory-based cross-connect with MAPS™ support for APS. It provides SDH/SONET mapping and de-mapping for Ethernet, DS3, E3, DS1, E1 and M13 multiplexers/de-multiplexers. The ADM400 is configured and managed by web based feature rich GUI. It fully complies with US telecom standard.
Features :
- Offers 2 x SFP for SONET/SDH (STM-4/1 or OC-12/3).
- Offers add/drop of 21 x E1s and 8 x FEs or 1 x GE (Copper and Fiber).
- Can be used in Unidirectional Path Switch Ring (UPSR) architecture as single ADM400 UPSR, Dual ADM400 North/South and dual ADM400 East/West.
- Can be used in Linear Automatic Protection Switching (APS) architecture as 1+1 or 1+n configuration.
- Provides MAPS™ hardware assistance for protection switching in the integrated cross-connect.
- Supports SONET/SDH Frame Structures in Tributary Path.
- When configured for SONET compatible operation, each of the eighty-four virtual tributary groups (VT groups) in STS-12 SPE can be independently configured to accept any one of the four tributary types (VT1.5, VT2, VT3, and VT6).
- When configured for SDH compatible operation, each of the four STM-1’s within the STM-4 may be independently configured to accept AU3, TUG3s in AU4. Each TUG2 may be independently configured to accept any one of the three tributary types (TU11, TU12, and TU2).
- Can be used as traffic aggregator.
- E3/DS3 can be mapped/de-mapped internally to support E3/DS3 interface elsewhere.
- Low power consumption (under 20 watts) and cooled by software controlled fans.
- SMC or SEC compliant timing synchronization with ability to time from line, BITS, T1/E1, or internal reference.
- Additional web based secured control and status monitoring support.
- It meets all US telecom standards.
Model :
OC-12-28T-8F/G for North America OR STM-4-21E-8F/G for Asia, Europe and other regions.
Interfaces:
- Two OC-12/3 or STM-4/1 interfaces with line protection via SFP optics
- One GE interface via SFP optics or RJ45 connector via copper twisted pair
- Ethernet (10/100) ports over copper twisted pair via RJ45 connectors
- Two 2.5G ESSI Expansion via high speed SATA type connectors
- Two (10/100/1000) RJ45 interfaces for LAN and console connections
- Two GE RJ45 connectors
- 28 T1 or 21 E1 over copper twisted pair via RJ45 connectors
Monitoring & Maintenance:
- Supports higher-order and Lower-order POH, SDH/SONET Level alarms and performance monitoring as Per ITU-T Rec. G.826 and G.784
- Supports remote software downloads and FPGA reconfiguration
- Supports various Local and Remote-loop-back
Timing & Synchronization:
Supports timing synchronization options from the SONET/SDH lines, a BITS T1/E1 interface, any of the T1/E1 recovered clocks, or an internal reference. A combination of a digital PLL and an analogue PLL are uses to meet the system requirements for synchronization, holdover and jitter.
It meets the ITU-T G.812 and G.813 timing requirements for STM-1 and STM-4. It also meets the Global timing requirements for OC-3/STM-1 and OC-12/STM-4. Selection between these two are configurable via software.
Protection:
- 1+1 and 1+n line protection
- 1+1 power redundancy
Power:
- Input power: 110/220V AC and/or -48V DC
- Power Consumption: Less than 20 Watts
- Dual power input
Tempature:
- Operating Temperature 0ºC to 70ºC
Physical Dimension:
- Size: 19" X 11" X 1U
- Weight: 7.5 pounds
UPSR Applications
Unidirectional Path Switch Ring (UPSR): Monitors the integrity of the received traffic and provides the control for path protection switch.
North / South Architecture
The North ADM400 receives and monitors the data carried on the working fiber. The South ADM400 transmits the protection data to the North ADM400 through a dedicated ESSI connection. The North and South ADM400s cover and transmit all data streams received on the system interfaces (PDH, Ethernet, ESSI, Telecom bus) to the ADM400 cross-connect that supports simultaneous low-order and high-order switching. The system data stream is also bridged to the mate ADM400 for data protection. The North and South ADM400s switch and re-transmit the data on both the working and protection fibers.
East / West Architecture
The East ADM400 receives and monitors the data carried on the working fiber. The West ADM400 transmits the protection data to the East ADM400 through a dedicated ESSI connection. The East and West ADM400s cover and transmit all data streams received on the system interfaces (PDH, Ethernet, ESSI, Telecombus) to the ADM400 cross-connect that supports simultaneous low-order and high-order switching. The system data stream is also bridged to the mate ADM400 for data protection. The East and West ADM400s switch and re-transmit the data on both the working and protection fibers.
Single ADM400 UPSR
The PlexStar ADM400 receives and monitors the data carried on the working fiber and convergesand transmits all data streams received to the ADM400 cross-connect that supports simultaneous low-order and high-order switching. The ADM400 then switches and re-transmits the data on both the working and protection fibers.
Linear APS Applications
The PlexStar ADM400 can be used in Linear Automatic Protection Switching (APS) architectures. It extracts and monitors the APS channel status, and optionally inserts and transmits a desired APS code.
1+1 Architecture
A 1+1 architecture is designed to continuously bridge the head-end signal to the working and protection equipment such that the same signal is transmitted identically to the tail-end equipment. The working fiber connects the head-end line transmitter to the tail-end receiver, while the protection fiber connects the auxiliary line transmitter and receiver. At the tail-end, the working and protection fibers are independently monitored for defects. The receiving equipment selects the active traffic source either from the working or the protection signal.
1+n Architecture
A 1:n architecture is designed to bridge any of the n working channels to a single protection line. When the protection line is not being used for protection, it shall be used to carry extra traffic. All n ADM400s are daisy-chained together through their auxiliary interface to transmit the protection signal carrying protection data or extra traffic across all devices.
The PlexStar ADM400 provides MAPS™ hardware assistance for protection switching in the integrated cross-connect. In band L-CODE generation, interpretation, and automatic switch selection for SONET/SDH-based channels can all be done in the ADM 622. UPSR applications can be fully implemented in hardware without any software assistance.
[