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Black Box MT195A-T1/E1-4 Copper T1 4-Wire Extender over G.SHDSL bis[MT195A-T1/E1-4]

Black Box MT195A-T1/E1-4 Copper T1 4-Wire Extender over G.SHDSL bis[MT195A-T1/E1-4]

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BLACK BOX MT195A-T1 Copper T1 4-Wire Extender over G.SHDSL

The BLACK BOX MT195A-T1 can extend a T1 Demark over 4 wires via propriatary scheme. 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 20over 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 BLACK BOX MT195A-T1 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 buffe
  • 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 (Nx64 Kbps, N=1 to 32)
Operation:            Full E1/T1 and Fractional E1
Payload:              Rates Up to 5.696 Mbps (for 2-wire model) or Up to11.4 Mbps (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

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

DSL Timing

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 • Local Loopback
Remote Line Loopback • Remote Payload Loopback
Far-end Line Loopback • Far-end Payload Loopback
V.54 Loopback (for V.35 interface) • 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


168 x 195 x 48 mm (D x W x H)




0 to 50°C (Operating), -10 to 70°C (Storage)


10 to 90% non-condensing



70,000 hrs.

Ordering Information

Model Name                      Description

MT195A-T1/E1-4               4-wire T1 Demark Extension with AC+DC Power
MT195A-T1/E1-4 -2PK      4-wire T1 Demark Extension with AC+DC Power, 2 PACK

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