Question on modem

[105547111]

At the moment I have a Alcatel Speedtouch Home.

Its running into my firewall / server by the 16 port switch.

The Alcatel is only 10MB half duplex, if I could get full duplex I would be happy.

What modems have a 100mb Full duplex output, or even a 10 MB full duplex.

I just get poor speeds when sending and receiving at the same time. Watching the traffic on the switch the half duplex is bottle necking up things, and the 10MB does not help.

I only need a modem, not a router / multiple port modem. I have a lot more PCs connected than 4 ports could give me.

Thanks!

[Reiner]

I think its the way modems do their buffering and I'm not sure you can get one that doesn't do this (maybe for SDSL?).

[3cakes]

one thing to remember, 105547111, is that your ADSL speed is 1500kbps max.

the duplexing won't affect the WAN response times because the modem will need to buffer the data it receives from your switch. (receiving data from its LAN interface at 10000kbps and transmitting it out the WAN interface at 1500kbps

port speed and duplexing will, however, affect intra-LAN speeds. if this is what you're concerned about buy a 10/100FD switch from tandy/dick smith/whomever you prefer buy this stuff from.

[105547111]

Guys,

Thanks for the reply!

I got my connection really screaming (upped the max d/l from 155 k/sec to 161K)

I plugged another cheap ethernet card into the server. This way its got two NICs, one to the 100MBPS switch which feeds all PCs. So I have 100 full duplex everywhere.

The new NIC feeds the Alcatel at 10 MB simplex. Since as you said the modem is buffered will see no speed reduction :)

Since the server is a Windows 2000 Advanced Server, I set up Routing and Remote Access to control the NAT.

Running Enternet (or rasPPPoE) only got the same 154K/sec.

Thinking further I read the Alcatel PDF and yes it supports ATM. So I got rid of Enternet and set up a ATM connection to dial into the Alcatel (which W2K launches without me touching). Its actually ATM PPTP but any server version of windows its all built into RARA. Its nice the Speedtouch Home supports this also. You simply put in the IP of the modem, log in username and password (even password box has a confirmation box just like a dial in client). And since Windows RARA controls this, if the connection drops it will auto reinitiate and everything is recorded in the system log!

Now I get 161K steady on any client. Tweak tests show my MTU is 1500. I am seeing faster uploads also.

So I am very happy!

I will go and play at a friends place and see if I can get the same out of his connection.

Cheers,

Dave