XtendLan G.SHDSL .bis NTU Series, Руководство пользователя, Страница: 6 / 166

painless. Further flexibility is provided as the ability to manually set the maximum NTU speed at different levels for
different customer-tailored service offerings.
1.1 Features

Standard G.SHDSL.Bis ITU G.991.2 (2004) supports improved reach/speed and greater interoperability

Fast and cost-effective provisioning of traditional frame relay (FR or T-HDLC) or TDM leased line services

User existing copper loop infrastructures

Can operate in point to point connection

Efficient single wire pair usage

Up to 5.696Mbps(2-wire) or 11.392Mbps(4-wire) symmetric service bit rate

Auto rate installation maximizes data rate based on loop conditions

Wetting current sink to protect SHDSL line

Local management interface with LCD display

Remote line loopback

SHDSL Line performance monitoring

Raw and per time interval statistics

Bandwidth guaranteed transmission equipment

Remote firmware upgrade
1.2 Specification
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: 64Kps to 5.696Mbps (N=1 to 89) for 2-wire model
128Kbps to11.392Mbps (N=2 to 178) for 4-wire model

Connection: RJ-45 jack (2-wire or 4-wire)

Impedance: 135 ohms
G.703 Interface (as E1)

Connection: RJ-48C for balanced 120Ω E1 cable and BNC for unbalanced 75Ω E1 cable

Line Rate : 2/- 50ppm

Line code: HDB3/AMI

Framing : PCM30/PCM30C/PCM31/PCM31C and Unframed

Data Rate : 64Kbps to 2.048Mbps ( Nx64Kbps , N=1 to 32)

Operation : Full E1 and Fractional E1
G.703 Interface (as T1)

Connection: RJ-48C for balanced 100Ω T1 cable

Line Rate : 1/- 50ppm

Line code: B8ZS