dial up connections

Dial-up networking
Layer 3-7 Switches
Modems/Cable Modems
Network Interface Cards
Network management software
Network Management Systems
Network testing
Networking services
hello everybody, could u please help me understand how dial up connections r given?if i am an isp how will i assign dynamic ip addresses to my clients and how will i monitor them? thanks xevier

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The dial-up access server (a modem bank that provides PPP service to your clients) is configured to distribute an IP address to each client. There are a few ways to do that.

1. Assign an address to each modem port. Most access servers allow this configuration.

2. Dynamically assign IP addresses using DHCP from the access server by creating a pool of addresses that the access server can use.

3. Dynamically assign IP adresses using a DHCP server somewhere else on your network, and forwarding the address request from the client during connection to the access server.

To manage the addresses properly, the first solution is the easiest to track IP addresses, but it is also the most inflexible solution. That is usually the tradeoff with monitoring – we either choose ease of monitoring or ease of configuration.

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  • Bobkberg
    Generally, the terminal or communications server that answers the phone call from your modem is configured to pull IP addresses from a DHCP server. The DHCP (Dynamic Host Configuration Protocol) provides the following minimum values to be passed to the dialup host: IP address, Subnet mask, Default router, DNS Server. The DHCP server may be internal to the server that answers the phone call, or it may be a separate machine that services many communications servers. As a side note, most ISP's (the larger ones anyway) do not actually have real modems - the phone "lines" come in on a T-1, T-3, or ISDN line with many "circuits" trunked together. This offers 2 benefits 1) It costs the ISP less money by not having to run in many wires, and 2) The signal processing systems can achieve a higher effective bitrate by avoiding yet another transition from digital back to analog. The incoming line is de-multiplexed (separated into different channels), and the signal is decoded into the intended binary signal by signal processing circuitry. Bob
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