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- Newsgroups: comp.dcom.modems
- Path: sparky!uunet!decwrl!csus.edu!netcomsv!mork!gerg
- From: gerg@netcom.com (Greg Andrews)
- Subject: Re: Upload 5 times slower than download
- Message-ID: <abnmzqd.gerg@netcom.com>
- Date: Wed, 29 Jul 92 04:12:34 GMT
- Organization: Netcom - Online Communication Services (408 241-9760 guest)
- References: <1992Jul18.041829.14575@nuscc.nus.sg>
- Distribution: all
- Lines: 30
-
- ctan@solomon.technet.sg (Tan Chee Weei) writes:
- >
- >Using a Telebit T2500 and ckermit 5A, uploading a file on a 9600bps connection
- >is somehow 5 times slower than downloading. The system that is being dialed
- >up operates through a terminal server. During uploading, the SD/RD lights
- >are observed to operate as follows: local modem sends, rather long pause,
- >receives acknowledgement and sends out immediately and so on. The problem
- >seems to be the delay in receiving the acknowledgement from the remote
- >modem for each packet sent. (Using 750 packet size with window size of
- >4 and block check 2). We are connect with v.42 and v.42bis enabled. Using
- >MNP alone, we constantly get corrupted characters during interactive
- >usage. (to the point of being unusable) During download, the lights flash
- >constantly without much delay as to be expected.
- >
- >Is there any explanation or solution to this phenomenon? Thanks.
- >
-
- Off the top of my head, it would appear that you're using different
- packet or window sizes for uploading than you do for download.
-
- The CKermit on Netcom's unix system (a Sun) can be configured to use
- different packet/window sizes for uploading, so perhaps that's what
- is happening to you...
-
-
- --
- .------------------------------------------------------------------.
- | Greg Andrews | UUCP: {amdahl,claris}!netcom!gerg |
- | | Internet: gerg@netcom.COM |
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