MODEM NOKIA BB256K

MODEL: BB256K

PRODUCENT: NOKIA

WIECEJ INFO TU:

http://www.netcom-cz.cz/nokia/bb256.pdf

KRÓTKI OPIS Z NETU:

BB256k Baseband Modems

The Nokia BB256kk baseband modem provides efficient and cost- effective digital subscriber transport at up to 256 kbit/s data rate using standard unconditioned copper-wire local loop facilities.

Product Concept

The Nokia BB256k is 64/128/256 kbit/s high-speed, 2-wire baseband modems using one twisted copper pair. It provides data rates from 2.4 kbit/s to 256 kbit/s for full- and half-duplex applications. The BB256k is versatile with its various alternatives for data interfaces and straightforward to install with its comprehensive test facilities. With its outstanding performance the modem offers ideal subscriber connections to digital networks and is highly suited for connections inside one copper distribution area. It fulfills all applicable specifications for safety and ECM disturbances. The BB256k can be used in the following applications:

• internet access

• links between workstations

• connections to access servers

• LAN interconnections

• links between access nodes

• composite links between multiplexers

Modem-to-Modem Management

The modem performs an automatic power-up self test when it is switched on. The test is used to check the most vital operational functions of the modem, and the results are displayed on the front panel display. Display-driven, real-time measuring monitors line signal quality. Remote modem power-off state as well as power-off in the remote DTE are shown on the modem’s front panel. Line quality and modem operation tests can be performed by the modem’s own test generator or, alternatively, by external test generators. Test loops can be started manually with the front panel controls or automatically using the ITU-T specified interface signals.

Automatic Data Rate Adaptation

Automatic data rate adaptation provides the possibility to adjust the line speed according to

• the DTE clock rate at the master modem

• the incoming line rate at the slave modem

The automatic data rate controlling minimizes the need for installation personnel on modem sites.

Technical Highlights

• 2-wire baseband modem for full-duplex transmission on local loop

• 2B1Q line coding

• 64, 128, 192 and 256 kbit/s line rates

• Interchangeable port adapters

• V.110 adaptation

• Adaptive line rate for range extension

• ITU-T V.54/V.52 line testing by display controls

• Automatic remote controlling

Interchangeable DTE Interface Adapters

V-series, X-series, Eternet, G.703, G.704/2M and EIA-530 DTE adapters can be selected as the cost-effective interface for application needs. The modem can be equipped with the V.110 rate adaptation capability to allow operation at 2.4 - 56 kbit/s.

STAN WIZUALNY JAK NA FOTOGRAFII.