Nokia M1112 Administrator's Manual page 11

M1112 Administrator Manual
both services utilise the same pair of wires, a filter is needed to separate
them. This is called an ISDN filter and it is a small external device
connected between your telephone and the telephone wall socket.
Your Nokia M1112 interconnects with a Digital Subscriber Line
Access Multiplexer (DSLAM) installed and maintained by your
access provider in their central office. M1112 ADSL technology is
based on Discrete Multitone (DMT) modulation allowing a maximum
of 8 Mbit/s data transmission from the network and 800 kbit/s towards
the network. However, these figures illustrate the maximum
performance of the technology and are subjected to the physical line
conditions and the distance from you to the central office. M1112 is
capable of adapting to the physical line conditions and guarantees the
maximum transmission rate possible on the particular line. M1112
adapts its speed to the line conditions in steps of 32 kbit/s. In addition
to these physical limitations affecting your data throughput, your
Internet Service Provider (ISP) may limit your access according to
their service provisioning policy and based on your service contract.
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