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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