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TCP Receive Window ( RWIN )
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Professional Poster
Join Date: Jan 2003
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A. Tethered to EDGE phone via Bluetooth TCP Receive Window (RWIN): 8192 B. Connected to a Cable Modem via Ethernet TCP Receive Window (RWIN): 65535
Here's my question: How can I increase the RWIN for port A (the EDGE phone)? Both IPNetTunerX and RMAC don't seem to do anything.
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Administrator  Join Date: Apr 2001
Location: San Antonio TX USA
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I wouldn't be surprised if the Bluetooth connection (or the phone itself) was sort of "narrow" in terms of RWIN capability. 8192 might be as big as you can get.
So far, the best thing I've found to mess with networking internals like the RWIN is a little utility called "RMAC." Look at this Broadband Reports FAQ page (in the answer to the first question) for a link. Yes, the utility's help is in Japanese, but the interface is in English, so I don't think that anyone who knows what a "RWIN" is will have any problem with it.
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Glenn -----OTR/L, MOT, Tx
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Professional Poster
Join Date: Jan 2003
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Originally Posted by ghporter
I wouldn't be surprised if the Bluetooth connection (or the phone itself) was sort of "narrow" in terms of RWIN capability. 8192 might be as big as you can get.
Apple seems to have optimized the PPP RWIN for 56K modems. The problem is that EDGE modems can easily blast past 170 kbps. 8192 bytes of receive buffer are just not enough.
I've tried fiddling around with RMAC, but that seems to change only the Ethernet RWIN value.
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Professional Poster
Join Date: Jan 2003
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I have found a simple and yet brilliant solution, which this screen is too small to show.
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