JUTBAAA@IUP.BITNET (Abhik Biswas) (08/29/90)
Date sent: 28-AUG-1990 13:46:19
I am trying to find the best cost effective option for high speed
modems (at least 9.6k) for use in India where the telephone line quality
is poor. If anyone has any experience in working in a similar situation please
advice.
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| Abhik Biswas | InterNet: JUTBAAA@oak.grove.iup.edu |
| Indiana University of | |
| Pennsylvania | Bitnet : JUTBAAA@IUPOAK |
| Indiana, Pennsylvania | |
| U.S.A. | Snail : Dont even bother. |
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| DISCLAIMER: I never said that. You must have been zzz'ing on the job |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~vernon@hpcvaac.cv.hp.com (Vernon King) (08/31/90)
I would look at modems that have the ability to change baud rates automatically as the line quality changes. I am assuming that India's phone system is compat- ible with ours. Error correction is a must. For cost effectivness I would look at v.32 modems with either mnp or lap-m for a start. You also could go with telebit trailblazers (the 2500 does both telebit and v.32) or hst modems. The three modems listed above seem to be the most popular but I have no idea what would be practical in India. I have heard that the phone system in parts of India are quite old. Some of it is Satellite. I think your results would vary from place to place. If I had to take a guess I would look at the telebit trail-blazer 2500 which would do both telebit pep and v32. Price is between 800 and 1200 dollars depending on vendor and your buying power. In a less expensive solution for just v-32 with mnp I have had good luck with Multitech v-32 mt932eawhich cost between 600 and 900 dollars. Disclaimer!! Modems and phone lines are not a exact science conditions can vary. Extreme long distances can vary in per-formance from day to day and from phone carrier to carrier. On any given day on dial-up phone lines you could be getting to your destination in many different methods (sa good luck Vernon t or fiber or coppe
shark@alchemy.ithaca.ny.us (Kris Stark) (09/03/90)
JUTBAAA@IUP.BITNET (Abhik Biswas) writes: > Date sent: 28-AUG-1990 13:46:19 > > I am trying to find the best cost effective option for high speed > modems (at least 9.6k) for use in India where the telephone line quality > is poor. If anyone has any experience in working in a similar situation pleas > advice. > Hmmm.... Leaves me to wonder, are you thinking of using the modem between cities, or only in one of the larger metros? Having lived in India for 8 years, and dealt with the phone system, I could almost say that you could almost totally forget all modem transmissions unless you are calling within a MNTL (Mahanagar Telephone Nigam Limited) network. Most other lines are so bad that the best option might just be a packet modem with a radio :-) The other problem you would face there is that the modem probably would not be able to recognize the weird signal tones that the phone network there uses, and you would definately have to add a spike and surge suppressor on the phone line. Apart from that, I would say that a trellis modem would be a necessity, not only because of the echo that the modems cause at the high speeds, but also because of the echo inherent in the phones out there... Simply said, I would think that to get any modem to work there would be a major miracle! I think we should make the country the official test site of all modems.... :-) Good luck if you do get anything to work... BTW there is an internet node in India, they might be able to help you out a little more. Unfortunately I cannot remember the name, but if you send me mail to STARK@ITHACA.BITNET I can dig out the name of the system and get more info that way... Kris