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RAD SPD-703-1 G.703 Codirectional
Rate and Interface Converter

Call us for Pre-sales and discount pricing

  301-924-7400 Support

RAD SPD-703-1 G.703 Codirectional Rate and Interface Converter
 

FEATURES

  • SPD-703-1, an Advanced Rate and Interface Converter, converts between the ITU G.703 codirectional (64 kbps) interface and several standard data communication interfaces.
  • SPD-703-1 performs two types of conversion:
    • Interface conversion: from G.703 to V.24, V.35, V.36, X.21, RS-530 or Ethernet;
    • Rate conversion: from 56 or 48 to 64 kbps.

    This enables connecting of a variety of DTE equipment to G.703 transmission equipment.

  • Operating full duplex at a data rate of 64 kbps, SPD-703-1 has a range of up to 800m (0.5 mile) from the G.703 equipment.
  • The converter's receive timing is the recovered clock from the G.703 signal. The transmit timing source is strap-selectable for either:
    • Recovered clock from the G.703 receive signal;
    • Internal timing.

    Two internal 16-bit elastic buffers accommodate for the difference in clocking phase.

  • SPD-703-1 acts as a rate adapter for connecting 48 or 56 kbps DTE equipment to a 64 kbps G.703 line. At 56 or 48 kbps, one control signal may be transferred end-to-end. Alternately, the available bandwidth can be used for a 1200 bps async secondary subchannel for connecting additional DTE equipment over the same link.
  • SPD-703-1 features ITU V.54 diagnostics, enabling local analog loopback and local and remote digital loopback tests. The loops are manually activated either by front panel switches or from the DTE interface (except for X.21).In addition to the loops, a front panel PATT switch generates a pseudo-random test pattern (511 bits), according to the ITU V.52 standard for testing end-to-end error free connectivity.
  • SPD-703-1 is available either as a standalone unit, or as a card for the ASM-MN-214 19" modem rack.
  • Special hardware for mounting the standalone unit in a 19" rack can be ordered separately. This hardware enables the installation of either one unit or two units side-by-side.

SPECIFICATIONS 

  • Conversion between G.703 codirectional interface and V.24, V.35, V.36 (RS-422), X.21, RS-530 interfaces, or a built-in Ethernet bridge
  • Selectable data rates: 48, 56 or 64 kbps
  • Selectable transmit timing source
  • Line protection circuits
  • Meets G.823 jitter requirements
  • V.54 diagnostic (loops 2 and 3)
  • Internal test pattern generator
  • ITU V.110 compatible (conversion of 56 to 64 kbps)
  • Second asynchronous subchannel up to 1.2 kbps

SPD-703-1/*/#
Standalone unit

SPD-703-1/R/#
Card version, for the ASM-MN-214 modem rack

ASM-MN-214/*/^
19" modem rack for 14 modem cards

# Specify DTE interface:
530 for RS-530 interface
V24 for V.24 interface
V35 for V.35 interface
V36 for V.36/RS-422 interface via an adapter cable
X21 for X.21 interface
UTP for built-in Ethernet/802.3 bridge with RJ-45 connector
BNC for built-in Ethernet/802.3 bridge with BNC connector
* Specify standalone and rack main power supply:
100 for 100 VAC operation 10%
115 for 115 VAC operation 10%
230 for 230 VAC operation 10%
48 for VDC operation from -42 VDC to -60 VDC
24 for VDC operation from 18 VDC to 32 VDC
^ Specify second power supply (redundant, optional):
For ordering options, see main power supply.

CIA/&
Connector Interface Adapter
for the ASM-MN-214 19" rack

& Specify connector:
V35/1 for adapting one modem card's 25-pin
connector to one V.35, 34-pin connector
X21 for adapting two adjacent modem cards' 25-pin
connectors to two X.21, 15-pin connectors

ORDERING

SPD-703-1/115/530
SPD-703-1/115/ETH
SPD-703-1/115/V24
SPD-703-1/115/V35
SPD-703-1/115/V36
SPD-703-1/115/X21
SPD-703-1/230/530
SPD-703-1/230/V24
SPD-703-1/230/V35
SPD-703-1/230/V36
SPD-703-1/230/X21
SPD-703-1/24/530
SPD-703-1/48/530
SPD-703-1/48/ETH
SPD-703-1/48/V24
SPD-703-1/48/V35
SPD-703-1/48/V36
SPD-703-1/R/530
SPD-703-1/R/V24
SPD-703-1/R/V35
SPD-703-1/R/V36

APPLICATIONS

 

RAD Products

For discount pricing on RAD Data Communications  
email us at sales@data-connect.com
or call 301-924-7400


     

1-301-924-7400
Sales Ext 17   Support Ext 25

2017 Data Connect Enterprise
3405
Olandwood Court
Olney, Maryland 20832