-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I believe that both your modem and your "customer" have modems designed for 56 Kbps download and 28 Kbps upload. Most ISPs have 56 Kbps upload and 28 Kbps download (opposite), so that the ISP customer can connect at 56 Kbps. If you both have a 28 Kbps upload modem, that means your "customer" can only download at 28 Kbps. Does this sound right? - -----Original Message----- From: phil@shrimpton.co.uk [mailto:phil@shrimpton.co.uk] Sent: Tuesday, April 10, 2001 3:32 AM To: suse-linux-e@suse.com Subject: [SLE] PPP Dial in server problems Hi, I have a working PPP dial-in server, but have a couple of problems. - - The maximum speed anyone can connected is 28Kbps. I can't find out how to increase this. My modem is 56.6Kbps, and I can dial-out at approximately 45Kbps - - This server has to share a phone like with a 'real' telephone, is there anyway to get it to detect the type of call (voice or data), so that it will only answer data calls, not the voice ones. Cheers Phil - -- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the FAQ at http://www.suse.com/support/faq -----BEGIN PGP SIGNATURE----- Version: PGP 7.0.1 iQA/AwUBOtMAVu+GQ6CQ3Fu5EQJARgCfezAwUnZlmFbwI1RWhN3TwU9+MGgAoLEK urg4jJdv4oafLVrEKrVcKeGY =omyW -----END PGP SIGNATURE-----
From: Cory Steers
Hi,
I believe that both your modem and your "customer" have modems designed for 56 Kbps download and 28 Kbps upload. Most ISPs have 56 Kbps upload and 28 Kbps download (opposite), so that the ISP customer can connect at 56 Kbps. If you both have a 28 Kbps upload modem, that means your "customer" can only download at 28 Kbps. Does this sound right?
It does, and it was something I did not know about (learn something new every day <g>). Is there anyway you can "reverse" a modems speeds (firmware upgrade, AT command etc.), or would I have to purchase a new one? A look at my modems technical specification reveals that the max upload time, should be 36.6, yet I can still only manage 28.8, so I still might have something set-up wrong somewhere. Cheers Phil
Is there anyway you can "reverse" a modems speeds (firmware upgrade, AT command etc.), or would I have to purchase a new one? In order to 'host' V.90 connections, You must be connected via a digital
On Tue, 10 Apr 2001, Phil Shrimpton wrote: phone line. While most of the ISP's use T-1 trunks or ISDN PRI into commercial multi-line terminal servers (e.g. USR Total Control Hub, Livingston PortMaster, etc.) I have heard of one 3Com/USR model which could 'host' a V.90 connection when connected to an ISDN BRI. Of course, ISDN standards and market availability may be different on your side of the pond... -- Rick Green "I have the heart of a little child, and the brain of a genius. ... and I keep them in a jar under my bed"
On Tue, Apr 10, 2001 at 04:40:21PM -0500, cory.steers.gmu9@statefarm.com wrote:
I believe that both your modem and your "customer" have modems designed for 56 Kbps download and 28 Kbps upload. Most ISPs have 56 Kbps upload and 28 Kbps download (opposite), so that the ISP customer can connect at 56 Kbps. If you both have a 28 Kbps upload modem, that means your "customer" can only download at 28 Kbps. Does this sound right?
56k modems only work at 56k if they connect to a special ISP modem. This is a digital modem (I assume using an ISDN line). As a result, the line from the ISP to your local exchange is all digital, only the connection between your modem and the local exchange is analogue. The ISP modem can make use of this by using some digital signal processing (DSP) techniques to improve the quality of the signal arriving at your modem. However, it doesn't work the other way round, so the transmit speed of a 56k modem is not 56k (I thought it was 33.6k not 28.8k, but I may be wrong). So, if you try to connect two 'consumer' 56k modems together, you will be limited by the lower transmit speed in both directions. HTH... -- David Smith Tel: +44 (0)1454 462380 (direct) STMicroelectronics Fax: +44 (0)1454 617910 1000 Aztec West TINA (ST only): (065) 2380 Almondsbury Home: 01454 616963 BRISTOL Mobile: 07932 642724 BS32 4SQ Work Email: Dave.Smith@st.com Home Email: David.Smith@ds-electronics.co.uk
participants (5)
-
Cory Steers -
Dave Smith -
Pedro-José VILA SANTOS -
Phil Shrimpton -
Rick Green