E1 or Fractional E1 Access Unit with ISDN S Interface

FCD-E1I E1 or Fractional E1 access unit with "S" interface is an access device for E1 or fractional E1 services which can be used as a rate or interface converter or as an integrating multiplexer. The unit comes equipped with four ISDN S interfaces, which can be used to extend ISDN services to areas lacking these services. The FCD-E1I can be used opposite RAD’s DXC products for multilink star applications, such as access to SDH networks.

• Extends ISDN services to remote area without ISDN facilities

• Operates with RAD's DXC multiservice access node for multilink star configuration

The FCD-E1I E1 or Fractional E1 access unit with "S" interface is an access unit for full or fractional E1 services. It has a single n x 56/64 kbps data port and four ISDN S interface ports. In addition, the FCD-E1I E1 or Fractional E1 access unit with "S" interface offers an optional sub-E1 drop-and-insert port for PBX connectivity.

The ISDN S interfaces can be used for extending ISDN services to locations that do not have ISDN access facilities. Each S interface port operates in full duplex mode over 4-wire twisted pairs at a range of up to 1,000 meters (3,300 feet). FCD-E1I E1 or Fractional E1 access unit with "S" interface can be ordered with an internal LTU (line termination unit), allowing direct connection to the E1 network, or connection via an external LTU. Optionally, it can also support a fiber optic main link interface for multimode or single mode fiber. This eliminates the need for an external fiber optic modem.

The FCD-E1I E1 or Fractional E1 access unit with "S" interface can operate opposite RAD’s modular DXC multiservice access node products in multilink star applications for access to SDH networks. The DXC units and the FCD-E1I operate under a centralized SNMP network management.

Timeslot assignment is programmable, allowing data from the data port and from the sub-E1 link to be placed into timeslots consecutively. FCD-E1I E1 or Fractional E1 access unit with "S" interface also provides additional flexibility by giving full user control over the data port timeslot allocation.

Multiple clock source selection ensures maximum flexibility for supporting different applications. The main E1 link may be clocked from the recovered receive clock, an internal oscillator, one of the data ports or the sub-E1 link.

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 multiframe, 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 of status and diagnostics can be performed via an ASCII terminal or SNMP. The FCD-E1I can be managed via any standard SNMP application or the RADview-HPOV/TDM SNMP network management application. In-band management is available via TS0 or a dedicated timeslot.

The FCD-E1I E1 or Fractional E1 access unit with "S" interface supports dial-in/dial-out, which can be used for remote out-of-band configuration and monitoring.

Enhanced diagnostics include user-activated local and remote loopbacks, an integrated BER tester and fractional E1 in-band loop. The FCD-E1I E1 or Fractional E1 access unit with "S" interface is available as a standalone unit for desktop use. A rack-mount adapter kit enables installation of one or two standalone units in a 19" rack.