qBRIDGE-201  «  Ethernet over PDH/SDH  «  www.nsgate.com
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qBRIDGE-201.     Dual E1 access unit/ "Drop-Insert" Multiplexer Brief  |  Manual


    qBRIDGE-201 is a dual E1 access unit with an opportunity of allocation of a part of E1 bandwidth (timeslots) for Ethernet traffic. The device has one 10/100Base-TX Ethernet port and two E1 ports. It can be used in a standard mode of interface converter (like qBRIDGE-101 with redundant E1 port) as well as "Drop-Insert" (Add-Drop) Multiplexer that can insert Ethernet traffic into user-selected timeslots and transfer transparently unused timeslots between E1 ports. Device operation is controlled by DIP-switches so no terminal is needed. E1 ports meet all requirements of ITU-T recommendations G.703, G.704, G.706, and G.732.
    In mode of interface converter qBRIDGE-201 can be used to connect remote LAN segments over standard E1 channels. The converter supports all functions of the qBRIDGE-101 but has a possibility to switch to redundant E1 port in case of primary E1 port failure. Device has Link-Loss forwarding function i.e. Ethernet port disabling in case of E1 failure.
    A "Drop-Insert" Multiplexer is used to replace data in selected timeslots of secondary E1 port incoming stream by HDLC encapsulated data from Ethernet port and output concatenated E1 stream to primary E1 port. At the same time it splits data received from primary E1 port to Ethernet port and secondary E1 port. Timeslots used for Ethernet traffic transport in primary E1 port are filled with selectable Idle Code in output secondary E1 port data stream. User can select any desired combination of E1 timeslots for Ethernet traffic transfer.
    Special relay module can be installed into qBRIDGE-201 to provide transparent bypass data transfer between E1 ports to keep integrity of Е1 link in case of power failure.
  The product is available with AC or DC power supply as a standalone unit in iron enclosures or as a card for 19" rack 6U.

Technical specifications:
Ethernet Interface
One Ethernet port 10/100Base-TX
IEEE 802.3/802.3u/802.3x flow control
Auto-Negotiation 10/100M; Auto-MDIX
Half/ Full duplex (10/100-20/200M)
Ethernet to HDLC encapsulation
Frame length up to 1536 bytes
Connector: Shielded RJ-45
Ethernet: "Bridge connection" mode
802.1d transparent learning bridge
MAC Table: 256 MAC address
IEEE 802.1q VLAN pass-through
Filtering and Forwarding: 90,000 pps
Frame Buffer: 340 frames
E1 Interface Framed/ Unframed
Interface: ITU-T G.703; Two E1 ports
Data rate: 64 - 2048 Kbps
Full Duplex mode
HDB3 coding; Impedance: 120 Ohm
Jitter performance: ITU-T G.823
Relative receive level: 0 to -43 dB
Clock modes: Internal or Recovered
ITU-T G.704, CRC4, CAS
Link-Loss Forwarding
Remote Loopback mode
Automatic alarm generation
Connectors: 2xRJ-45
Configuration: DIP-switches
Various Diagnostic LED Indicators
Power supply: 100~240VAC/36~72VDC
Power consumption: 3 W
Size: 182 x 140 x 30 mm (metal case)
Weight: 0,6 Kg
qBRIDGE-201 appl
Order Information
ModelP/N Power SupplyImplementation
qBRIDGE-201     36BEU201AC 100~240VACStandalone unit
qBRIDGE-201-DC 36BED201DC 36~72VDCStandalone unit
qBRIDGE-201-R   36BER201DC 36~72VDCCard for 19" rack 6U