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The Metrodata AP platform enables the interfacing of odd serial bit rates, standard telco services and infrastructure, and LAN/IP and other non-ATM services into a single converged platform.
Narrowband (8kbps) to Wideband (155Mbps STM-1/OC-3) data rates are supported.

AP3000 frontAP4000 frontAP8000 front

AP Access Processor Modular Chassis

APSAT ATM Access Processor

The AP is a multi-standard convergence platform enabling the integration of multiple disparate services over a common infrastructure. North American and European terrestrial telecoms and datacoms services are supported, as well as common serial, satellite and broadcast interfaces. Specialist modules unique to the AP enable the creation of efficient Satellite and Defence infrastructures.

The AP can be used as a simple ATM switch, an Access Concentrator of non-ATM services, or even as an Interface Converter/Fibre Optic Multiplexer. The AP interface modules have evolved out of existing carrier/telco products and also customer requirements for back-hauling satellite links and multiplexing terrestrial services over satellite. The AP can support a mixture of ATM and non-ATM traffic, typically using ATM as the transport mechanism which is transparent to both the application and the customer.

The AP has the following key features:

  • Fully non-blocking back plane - no bottlenecks or restrictions (even non-ATM in to non-ATM out applications supported)
  • Extensive range of interface modules - any slot for any module
  • Hot swap interface modules - configuration automatically re-instated onto replacement modules
  • Asymmetric, Simplex and Full Duplex operation on all port types
  • Point-to-point and Point-to-Multi-point topologies supported

The AP is a flexible modular platform which can support a wide variety of communication transmission applications, of which a few examples are shown below.

Example Applications

Satellite Back haul

Satellite Backhaul

This application diagram shows how a pair of AP3000s can be used to back haul a variety of different data services from a satellite earth station to a remote router. Asymmetric services with exacting clocking and timing requirements can be implemented using the flexible interface modules supported on the AP platform thereby maximising the satellite data throughput. A wide variety of satellite modem interfaces can be supported including EIA530, HSSI, ECL and ASI, and these services can be back hauled over a wide variety of terrestrial leased lines including E3, DS3 and STM-1/OC-3.

ATM over Satellite

ATM over Satellite

This application diagram shows how a wide variety of ATM services can be transported over satellite services operating both symmetrically and asymmetrically at flexible transmission rates. The serial ATM UNI modules (EIA530 UNI, HSSI UNI and ASI UNI) support the transport of native ATM cells across the serial interfaces offered by satellite modems, and having DTE interfaces, these modules will operate at the exact speeds specified by the satellite modems, even highly asymmetrically. A wide variety of ATM services including E3, DS3 and STM-1/OC3 can be transported over a wide variety of satellite modem interfaces including EIA530, HSSI and ASI.

Transport encrypted data over an ATM network

Transport Encrypted Data over ATM

This application diagram shows how encrypted data can be transported across an ATM network. Flexible circuit emulation modules supporting exact frequencies and complex clocking modes transport encrypted data transparently across an ATM network irrespective of the application or data rate.

Multi-service Convergence over Satellite

Multi-service Convergence over Satellite

This application diagram shows how multiple services can be converged over a satellite link. Voice, video and data services can be converged, prioritised and transported across a satellite link. The flexibility offered by the different AP interface modules allows a wide variety of voice, data and video services to be supported, for example: E1 PBX, HSSI and Ethernet router data, E3, DS3 and STM-1/OC3 ATM switch data, as well as E3 and ASI broadcast video. This converged data can be transported over a wide variety of satellite modem interfaces including EIA530, HSSI and ASI.

Asymmetrical Satellite Services

Asymmetrical Satellite Services

This application diagram shows how asymmetric data services can be provisioned over a satellite link. This scenario is particularly useful for international internet services which are by definition highly asymmetric. Metrodata's solution here resolves the transmission problems by interfacing between the terrestrial and satellite networks. In particular the uni-directional functionality offered on the AP platform can allow different interfaces to be used for each direction, e.g. the use of a HSSI satellite modulator and an EIA530 satellite demodulator.

High Speed Satellite Data Services

High Speed Satellite Data Services

This application diagram shows how a high speed data service can be provisioned over a satellite link. Metrodata have a number of customers who are benefiting from maximising their satellite data throughput by overcoming the historic limitations imposed by their terrestrial network. In particular problems arise when trying to deliver satellite services above 52Mbps (the maximum rate supported via router HSSI interfaces and STS-1/OC-1 services) and below 155Mbps (which can only be achieved with the highest performance satellite infrastructure).

Satellite Service Distribution

Satellite Service Distribution

This application diagram shows how multiple high speed data services can be provisioned from a single hub over multiple speed satellite links. The associated infrastructure savings within the satellite earth station can be considerable.

The AP is based around a modular chassis, which is available in 3 sizes:

  • AP3000 : 3 Slot (2U 19 inch rack mount)
  • AP4000 : 4-5 Slot (4U 19 inch rack mount)
  • AP8000 : 8-9 Slot (6U 19 inch rack mount)

The AP supports the following non-ATM interface types:

  • Telecoms: T1, E1, E2, E3, DS3
  • Datacoms: 10/100BaseT, EIA530, HSSI
  • Broadcast: ASI
  • Satellite: EIA530, HSSI, ECL, ASI

The AP supports the following ATM interface types:

  • Telecoms: E1, E2, E3, DS3, STM-1, OC-3
  • Datacoms: EIA530, HSSI
  • Broadcast: ASI
  • Satellite: EIA530, HSSI, ECL, ASI

AP3000 frontAP3000 AC rear

The AP3000 chassis has the following features:

  • 3 hot swap interface module slots
  • Compact 2U 19 inch rack mount chassis
  • Choice of Integral Power Supply, 100-250V AC or -48V DC
  • Local Management via Dual RS232 Console Ports (9-way D-type connectors with both DCE and DTE pin outs)
  • Remote Management via Integral 10/100BaseT Management Port (also offers limited performance RFC1483 data path)
  • Station Clock Port
  • External Alarm Relay Port (9-way D-type)

The AP3000 is typically used to back-haul Asymmetric satellite services cost effectively over fiber, WAN, ATM or microwave radio links. The AP3000 can also be used as a Satellite de-multiplexer in a Hub/Spoke network.

AP3000 Ordering Information
Order Code
Product AC Mains: 100 - 250 VAC DC Power: -48 VDC
AP3000 80-07-003 80-18-003

AP4000 frontAP4000 AC rear

The AP4000 chassis has the following features:

  • 4 to 5 hot swap interface module slots
  • 4U 19 inch rack mount chassis
  • Choice of Single or Redundant Hot Swappable Power Supply, 100-250V AC or -48V DC
  • Local Management via Dual RS232 Console Ports (9-way D-type connectors with both DCE and DTE pin outs)
  • Optional Call Processor for In-band Remote Management (alternatively this slot can be used for 5th interface module)
  • Station Clock Port
  • External Alarm Relay Port (9-way D-type)

The AP4000 is typically used as a Satellite Hub Multiplexer to aggregate multiple terrestrial services over satellite, or aggregate multiple satellite services over fiber, WAN, ATM or microwave links. Where redundant power supplies are a requirement it can also be used as a Satellite de-multiplexer in a Hub/Spoke network.

The AP4000 can be used for high speed satellite link back-haul, where there is a requirement to support 3-4 satellite services over a single link.

AP4000 Ordering Information
Order Code
Product AC Mains: 100 - 250 VAC DC Power: -48 VDC
AP4000L 5 slot chassis (no inband mgmt) 80-07-101 80-18-101
AP4000LR redundant 5 slot chassis (no inband mgmt) 80-07-121 80-18-121
AP4000 4 slot chassis (with inband mgmt) 80-07-001 80-18-001
AP4000R redundant 4 slot chassis (with inband mgmt) 80-07-021 80-18-021

AP8000 frontAP8000 AC rear

The AP8000 chassis has the following features:

  • 8 or 9 hot swap interface module slots
  • 6U 19 inch rack mount chassis
  • Choice of Single or Redundant Hot Swappable Power Supply, 100-250V AC or -48V DC
  • Local Management via Dual RS232 Console Ports (9-way D-type connectors with both DCE and DTE pin outs)
  • Optional Call Processor for In-band Remote Management (alternatively this slot can be used for 9th interface module)
  • Station Clock Port
  • External Alarm Relay Port (9-way D-type)

The AP8000 can be used to aggregate multiple satellite services at high data rates, across a variety of infrastructures. Within Military Satcoms it provides a means of multiplexing up to 8 remote satellite terminal links onto a single back-haul or reach-back link. Added to this is the fact that it can run 7 EIA530 Crypto End to End links at a Maximum 20Mbps per link.

AP8000 Ordering Information
Order Code
Product AC Mains: 100 - 250 VAC DC Power: -48 VDC
AP8000L 9 slot chassis (no inband mgmt) 80-07-111 80-18-111
AP8000LR redundant 9 slot chassis (no inband mgmt) 80-07-131 80-18-131
AP8000 8 slot chassis (with inband mgmt) 80-07-011 80-18-011
AP8000R redundant 8 slot chassis (with inband mgmt) 80-07-031 80-18-031

There are many different ways of using the AP to converge and transport a variety of different non-ATM services over either non-ATM or ATM infrastructures.

These modules use unstructured AAL.1 adaptation to transport data streams with ANY payload data format transparently over alternative infrastructures.

The following services are supported by the AP Circuit Emulation "CE" modules:

  • Telco Circuits and Standard Terrestrial Interfaces - T1, E1, E2, E3 and DS3
  • Serial Satellite, Broadcast and Crypto Interfaces - EIA530, HSSI, ECL and ASI
  • IP, Ethernet and LAN - 10/100Base T Wire Speed

Further detail about the applications supported are via the links below:

  • Quad T1 CE module - legacy services at 1.5Mbps Telecom rates, e.g. North American leased lines.
  • Quad E1 CE module - legacy services at 2Mbps Telecom rates, e.g. PBX, E1 G.703 2Mbps leased lines.
  • Dual E1 CE module - legacy services at 2Mbps Telecom rates, e.g. PBX, E1 G.703 2Mbps leased lines.
  • Dual E2 CE module - legacy services at 8Mbps Telecom rates, e.g. E2 G.703 8Mbps leased lines.
  • E3 CE module - legacy services at 34Mbps Telecom rates, e.g. E3 G.703 34Mbps leased lines.
  • DS3 CE module - legacy services at 45Mbps Telecom rates, e.g. DS3 G.703 45Mbps leased lines.
  • 10/100BaseT LAN CE module - transparently bridges 10/100BaseT LANs.
  • EIA530 CE module - serial data streams (of up to 20Mbps), e.g. router serial cards, encrypted data and satellite modems.
  • HSSI CE module - serial data streams (of up to 110Mbps), e.g. router serial cards, encrypted data and satellite modems.
  • ECL CE module - serial data streams (of up to 110Mbps), e.g. router serial cards, encrypted data and satellite modems.
  • ASI CE module - broadcast video data streams (of up to 52Mbps), e.g. video codecs, satellite modems and broadcast infrastructure.

These non-ATM services can be concentrated, muxed using the ATM modules shown on the ATM UNI Modules tab, as well as being integrated with ATM services and muxed over ATM trunks.

AP CE Module Ordering Information
Module Order Code
Quad T1 RJ45 CE 80-07-301
Quad E1 RJ45 CE 80-07-303
Dual E1 BNC CE 80-07-302
Dual E2 BNC CE 80-07-304
E3 BNC CE 80-07-305
DS3 BNC CE 80-07-306
EIA530 CE 80-07-344
HSSI CE 80-07-309
ECL CE 80-07-343
ASI BNC CE 80-07-332
10/100BaseT LAN CE 80-07-345

The Metrodata AP supports the standard ATM interfaces common on other complimentary ATM switches so we can easily interoperate with Cisco, FORE, Alcatel etc. We also specialise in supporting legacy and new serial interface speeds on our AP platform, providing ATM cell transport over serial.

The AP supports the following ATM interfaces / services:

  • Telco Circuits and Standard Terrestrial Interfaces - E1, E2, E3, DS3 and OC-3 / STM-1
  • Serial Satellite and Crypto Interfaces - EIA530, HSSI and ASI
  • APS Switching and Resilience - APS protected SDH UNI module (operates at OC-3 / STM-1)

A great deal of deployed AP units are with the US DoD and as such we have developed and continue to develop specific modules for Defense requirements, as well as adding Defence features to existing Modules.

These ATM UNI modules supported are shown below (click on a link to for further information):

  • E1 ATM UNI - enable connection to ATM services, either as network or switch ports.
  • E2 ATM UNI - enable connection to ATM services, either as network or switch ports.
  • E3 ATM UNI - enable connection to ATM services, either as network or switch ports.
  • DS3 ATM UNI - enable connection to ATM services, either as network or switch ports.
  • STM1/OC3 ATM UNI - enable connection to ATM services, either as network or switch ports.
  • APS Protected SDH UNI - enable important circuits to have a backup fibre to ensure network survivability in the event of failure.
  • EIA530 UNI - enable direct connection to an EIA530 satellite modem at up to 20Mbps, supporting native ATM UNI data.
  • HSSI UNI - enable direct connection to an HSSI satellite modem at up to 110Mbps, supporting native ATM UNI data.
  • ASI UNI - enable direct connection to broadcast infrastructure, e.g. an ASI satellite modem at up to 155Mbps.
AP UNI Module Ordering Information
Module Order Code
E1 UNI 80-07-201
E2 UNI 80-07-202
E3 UNI 80-07-203
DS3 UNI 80-07-205
OC-3/STM-1 UNI MM 80-07-207
OC-3/STM-1 UNI SMSH 80-07-208
OC-3/STM-1 UNI SMLH 80-07-209
Resilient OC-3/STM-1 UNI MM 80-07-216
Resilient OC-3/STM-1 UNI SMSH 80-07-217
Resilient OC-3/STM-1 UNI SMLH 80-07-218
EIA530 UNI 80-07-219
HSSI UNI 80-07-213
ASI UNI 80-07-215

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