help tweaking Dual ISDN

[remedy]

I live in the boonies and this is the only type of connection we can get, so I'm trying to optimize it for video games, specifically Halo PC.

1. What type of connection do you have? i.e. 56K, ISDN, DSL (PPPoE or not), Cable etc.
Dual ISDN

2. Who is your ISP and what is your advertised speed from them? i.e. Cox.net & 3000/256 - this is advertised in kilobits per second.
Southwestern Bell & I have no idea what the advertised speed is. My parents have had this connection before I was born(I'm 18 now).

3. What are your current settings now? Do a TCP/IP Analyzer Test and copy and paste the results (remember to XXXXX out your IP address) here.

« SpeedGuide.net TCP Analyzer Results »
Tested on: 06.25.2010 21:24
IP address: x.xxx.xx.xx
Client OS: Windows XP

TCP options string: 020405b4010303010101080a000000000000000001010402
MSS: 1460
MTU: 1500
TCP Window: 128480 (multiple of MSS)
RWIN Scaling: 1 bits (2^1=2)
Unscaled RWIN : 64240
Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
BDP limit (200ms): 5139kbps (642KBytes/s)
BDP limit (500ms): 2056kbps (257KBytes/s)
MTU Discovery: ON
TTL: 58
Timestamps: ON
SACKs: ON
IP ToS: 00000000 (0)


4. Please tell us your operating system i.e. 95, 98, 98SE, ME, 2K or XP.
XP SP3

[100 010 00]

double isdn line u mean 64k+64k? if u so, set your rwin to 16060 or 8030. Also disable nagle algorithm for better latency and set retranmissions to 10. See broandband tweaks for the last two