4Wire G.703 Modem

Features :

  • Configuration Through DIP Switches
  • Provides multi stage line protection as per K.20 and K.21
  • External Secondary optional Line Protection Device
  • Long reach up to 11Kms. for standard 64Kbps speed
  • LED Indications for easy Monitoring
  • Front Panel Switches for Diagnostics or Loopbacks
  • Supports 230V AC and 48V DC with the Same Socket
  • Works from 64Kbps to 2048Kbps insteps of 64Kbps speeds

Technical Specifications

G.SHDSL LINE INTERFACE

  • Line type : 2 or 4 Wire twisted copper wire of 0.5mm Diameter
  • Line Code : TCPAM as per the ITU-T G991.2 ( Annex A and Annex B )
  • Bandwidth : Operates From 64Kbps to 2048Kbps
  • Line Impedance : 135 Ohms
  • Transmit Signal Power : 16 dBm +/- 0.5dBm
  • Operating Range in 2 Wire : 6 Kms. on 0.5mm diameter copper cable @ 2.048Mbps data rate
  • Operating Range in 4 Wire : 8 Kms. and Above on 0.5mm diameter copper cable @ 2.048Mbps data rate
  • Operating Mode : 2Wire or 4 Wire selection through DIP switches
  • Line protection : As per ITU-T K20 and K21
  • Transmit Level : Upto 16dBm
  • Connector : RJ 45
  • Surge Protection : Internal and Optional External Surge Protection

CLOCKING MODE

  • External ( Recovered from the E1 Interface ) , Internal , Recovered From DSL Line

G703 E1 INTERFACE SPECIFICATIONS

  • Interface : E1 Interface (4 wire) as per CCITT G.703, G.704
  • Framing : As Per ITU-T G.703 and G.704 Framed and Unframed Operation (Supports PCM31 and PCM30 with the CRC Enable and Disable Operation)
  • Line Code : HDB3
  • Speed : 2.048 Mbps (n*64), N=1 to 32)
  • Impedance : 120 Ohms (Balanced), Optional : 75 Ohms (Unbalanced)
  • CRC : CRC-4 Generation and Checking
  • Transmit Clock Mode : Internal clock or G.703 Recovered clock/Recovered from line
  • Timeslot Selection : Programmable Time slot selection
  • Connector : RJ45

DIAGNOSTICS

  • Local Loopback, Digital Loopback and Remote Loopback as per the ITU-T V.54 standard
  • All loop back tests and BERT should be operated through Front Panel switches
  • Built in test 511 pattern generation and checking (BERT) for the DSL Line as well as the PCM E1 Checking
  • End to End Diagnostics and Status Monitoring is through the Embedded Operation Channel EOC without Interrupting the Data

MODEM CONFIGURATION AND STATUS MONITORING

  • Modem Configuration Through Dipswitches

MODEM LED INDICATIONS

  • PWR, MR, COT, DSL LINK, G703SYNC, AIS, PAT, ERR, TST

POWER SUPPLY FOR BOTH THE G703 AND V35 MODEM

  • DUAL MODE AC/DC, 230VAC +/- 10% & 48VDC +/-10%

TEMPERATURE

  • -5 To 60C

HUMIDITY

  • Upto 95% non condensing

LINE PROTECTION

  • As per ITU K.20/K.21