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Megabit Modem 310F and 320F User Manual 1
1
MEGABIT MODEM 310F AND 320F
FEATURES AND APPLICATIONS
The ADC
®
Megabit Modem
®
310F and 320F use Asymmetric Digital Subscriber Line (ADSL)
technology to provide a multi-megabit connection between the two modems using a single-pair
telephone line. The Megabit Modem 310F and 320F are designed to be used together, one at
each end of a circuit, with the model 310F functioning as the ATU-C and the model 320F
functioning as the ATU-R. The Megabit Modem 310F and 320F use Discrete MultiTone (DMT)
line coding. In addition, ADSL technology allows POTS (Plain Old Telephone Service) to
coexist with the high-speed data service on the same wire pair.
The Megabit Modem 310F and 320F support the full DMT rate of 64 kbps to 7040 kbps
downstream and 64 kbps to 928 kbps upstream. The Megabit Modem 310F and 320F can be
used in either rate adaptive mode, in which the modem speed automatically adjusts to the
maximum attainable data rate depending on distance and line condition, or you can select
a fixed rate.
FEATURES
Megabit Modem 310F and 320F features include:
• 10BASE-T Ethernet port for LAN connection
• ADSL port for ADSL connection
• IEEE 802.1d transparent MAC layer bridging of frames received on the LAN port
• full DMT transmission rates
– 64 kbps to 7040 kbps downstream
– 64 kbps to 928 kbps upstream
• RS-232 port for management
The Spanning Tree protocol is not supported in the Megabit Modem 310F or 320F.