The FCD-E1A is an access unit for full of fractional E1 services. The FCD-E1A can be ordered with either one or two data ports and with an optional sub-E1 drop-and-insert port. The data port rates are selectable for any multiple of 56 kbps or 64 kbps, up to 1,984 kbps.
Alternatively, one of the data ports can be replaced by an Ethernet bridge, providing direct connection to the LAN. In the FCD-E1A, one of the data ports can also be replaced by four SO interfaces for ISDN BRI extension or by an ISDN backup interface.
The FCD-E1A access unit has a built-in internal line termination unit (LTU) capability, allowing for direct connection to the E1 network, and can be configured with or without an LTU by the customer.
The FCD-E1A access unit can operate with RAD's modular DXC multiservice access node products for multilink star applications, including access to SDH networks. The DXC units and the FCD-E1A operate under centralized SNMP network management.
Programmable timeslot allocation
Timeslot assignment is programmable, allowing data from each data port and from the sub-E1 port to be placed into timeslots on the main link, either consecutively or alternately. The FCD-E1A access unit also allows flexible timeslot allocation of the data port timeslots. Each timeslot of the sub-E1 port is placed on the same timeslot of the main E1 link.
Multiple clock source selection ensures maximum flexibility, both for the main link and for the data ports, enabling the support of different applications.
Immunity to hardware and power failures is provided by bypassing the sub-E1 port to the main E1 link, ensuring uninterrupted service to the sub-E1 port.
The E1 interface meets all requirements of ITU recommendations G.703, G.704, G.706 and G.732. It supports both two and 16 frames per multi-frame, with or without CRC-4. Zero suppression over the line is HDB3. The integral LTU ensures a range of up to 2 km (1.2 miles).
Setup, control and monitoring
Setup, control and monitoring of status and diagnostic information can be activated in four ways:
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Front panel LCD with pushbuttons (menu-driven management)
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ASCII terminal connected to the async control port (command line interpreter)
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SNMP management connected to the async control port
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In-band management through a dedicated timeslot or TS0, supporting proprietary protocol and Frame Relay RFC 1490
The FCD-E1A supports an internal SNMP agent and can be controlled by any generic SNMP station or by the RADview-HPOV or RADview-PC SNMP network management application.
The FCD-E1A access unit supports dial-in/dial-out, which can be used for remote out-of-band configuration and monitoring (dial-in) and for alarms (dial-out).
Maintenance capabilities include user-activated local and remote loopbacks and internal BERTs on the main E1 link, sub-E1 link and data ports.
The FCD-E1 access unit is available as standalone unit for the desktop or a 19-inch rack shelf.
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