2 / 4 – Wire G.SHDSL.bis TDM Multi – Interface (E1 / T1, V.35, LAN) NTU

The COPPER-T-2/4 can extend a T1 Demark over 2 wires or 4 wires via G.SHDSL bis. The T1+E1 uses balanced 120ohm and 100ohm via T1 RJ45. The E1 unbalanced 75ohm uses dual BNC’s. The serial port V.35 interface uses a DB25 connector with a DB25 and V.35 adapter cable. DB25 is RS530, X.21 and RS449. The serial data rate is up to 5.7 mbps over 2 wires and up to 11.4mbps over 4 wires. Ethernet 10/100 auto negotiated via the RJ45 LAN connector. The range of interfaces enables fast and cost-effective services on voice, TDM and Data on a single or two wire pair of existing copper loop infrastructure.

The COPPER-T-2/4 can be configured and managed with the LCD on the front of the unit or menu driven by a VT100 asynchronous terminal interface locally or remotely.


  • Multi-Interface (E1/T1, V35, Ethernet) G.SHDSL.bis modem
  • Supports fractional E1/T1 Nx64 V.35, X.21, RS-530, RS-449 and Ethernet over SHDSL, all at the same time
  • Standard ITU G.991.2 (2004) supports improved reach,speed and interoperability compared to conventional G.SHDSL
  • Fast and cost-effective services of voice, TDM and data on a single or two wire pair of existing copper loop infrastructure
  • Local management interface with console menu
  • Remote line loopback
  • E1/T1 performance monitoring and alarm buffer
  • G.SHDSL.bis Line performance monitoring (data rate and SNR)
  • Raw and per time interval statistics



WAN Interface
Line Rate: ITU G.991.2 (2004)
Coding: Trellis Coded Pulse Amplitude Modulation (TC-PAM16 and TC-PAM32) Support Annex A ,B , F and G
Payload rates: 192Kps to 5.696Mbps (N=3 to 89) for 2-wire model. 384Kbps to11.392Mbps (N=6 to 172) for 4-wire model
Connection: RJ-45 jack (2-wire or 4-wire)
Impedance: 135 ohms

E1/T1 Interface
Connection: RJ-45 for balanced 120Ω E1, 100Ω T1 cable and BNC for unbalanced 75Ω E1 cable
Line Rate: E1: 2048KHz +/- 50ppm , T1: 1.544Mbps
Framing: PCM30/PCM30C/PCM31/PCM31C and Unframed E1/T1
Data Rate: 64Kbps to 2.048Mbps ( Nx64Kbps , N=1 to 32)
Operation: Full E1/T1 and Fractional E1
Payload rates: Up to 5.696Mbps(for 2-wire model) or Up to11.4Mbps(for 4-wire model)
Support: V.35 or RS-530/V.36/X.21

LAN Interface
10/100Mbps RJ45 Interface
Half/Full Duplex, Auto-sensing, Auto-Crossover
Up to 1024 MAC address learning
Standard HDLC WAN encapsulation

Indications: Power, Alarm, Test, SYNC, Error, LBK, E1, Data, Eth

DSL Timing

  • Internal
  • From E1/T1 Recovery (as E1/T1)
  • From DTE ( as V.35 )

Performance Monitoring ES, SES, UAS, LOWS, Alarms and Errors

Loopback Tests E1/T1 and V.35 interface only

  • Local Digital Loopback
  • Remote Line Loopback
  • Far-end Line Loopback
  • V.54 Loopback (for V.35 interface)
  • Local Loopback
  • Remote Payload Loopback
  • Far-end Payload Loopback
  • Build-in 2047 pattern BER tester


  • Configuration with keypads and LCD display
  • Console port (RJ-45 , RS-232)
  • Supports firmware upgrade

Power Input: AC Input: 100~240VAC, DC Input: -36 ~ 72VDC
Power Consumption: < 10W
Dimensions: 168 x 195 x 48 mm (D x W x H)
Weight: 0.85kg
Temperature: 0 ~ 50°C (Operating), -10 ~ 70°C (Storage)
Humidity: 10 ~ 90% non-condensing
Certifcation: CE, FCC, RoHS
MTBF: 70,000 hrs

Ordering Information

Model Name                                               Description
COPPER-T-2/4                   2/4-wire T1 Demark Extension with AC+DC Power

COPPER-T-2/4-2PK           2/4-wire T1 Demark Extension with AC+DC Power, 2 Pack