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<indicator name="Front">[[File:Menu-cog.svg|link=:Category:Line Settings|30px|Back up to the Broadband Line Settings]]</indicator>
== Line Rate ==
This shows your line rate:
[[File:LineRateNew.png|none|frame|Line rate as shown on the control pages: 39.8M - Good!]]
At 100%, the LNS throttles you to exactly your line's capacity. At 110%, it will let through 110% of your line capacity, and allow the wholesaler's systems to buffer/drop the excess. At the 95%, it lets through 95% of the line's capacity, so it will unaffected by the wholesaler's buffering. Setting to less than 100 is advised for lines running VoIP and other realtime services as it means the downlink won't be filled. Lowering the rate from 100% (e.g. to 95%) will mean that there should be no network buffering within the wholesalers network - and may well reduce latency when downloading at the full rate of the line.▼
[[File:LineRateSlowNew.png|none|frame|This one has a rate of: 338K - Something is Wrong!]]
== Changing the Line Rate ==
==FastTimeout==▼
Uses a PPP LCP Echo timeout of 10 seconds rather than 60 before entering the LostCarrier state.▼
This sets the line rate on your line:<br />
'''More info:''' LCP echoes usually stop responding if the line has gone down. Our LCP monitoring, which produces the graphs will drop the line if there are no replies after 60 seconds. When [[bonding]] or used in a fall-back setup, having a faster timeout is useful in order to fall-back quicker.▼
This change is applied the next time you connect (Re-PPP).
[[File:LineOptionsRateNew.png]]
Line Options:
==MTU==▼
Forces an MTU of regardless of what is negotiated by your router.▼
[[File:LineOptionsRate100.png|none|frame|At 100%, the LNS throttles you to exactly your line's capacity.]]
'''More info:''' MTU is negotiated upon connection. We usually like 1500 MTU, however, there can be situations where by forcing 1492 is required. For example, if your router negotiated 1500 initially but you make a connection to a server that want's to re-negigotiate a lower MTU it will try to di this using ICMP, but if your router has a miss-confuigured firewall that blocks ICMP this can't be re-negoiated and the connection to the server will have problems. This is seen when connecting to certain web sites, bank web sites and https sites. Forcing 1492 from the start means that all your traffic is in packets of 1492 bytes and so won't have this problem.▼
[[File:LineOptionsRate110.png|none|frame|At 110%, it will let through 110% of your line's capacity, and allow the wholesaler's system to buffer or drop the excess.]]
▲
==TCPFix==▼
Modifies the MSS in TCP packets so that it does not exceed the MRU▼
Example:
==MRUFix==▼
When sending IP traffic, ignore the MRU we receive during PPP negotiation. This can save a LCP renegotiation (which has been known to help OBSD based PPP's)▼
[[File:Cqm-ratedrop.png|none|frame|Changing the rate from 100% to 95% reduces average latency when filling the downlink.]]
==LCPFix==▼
Re-negotiates PPP LCP after acquiring the connection from BT (who may provide a wrong high MTU of 1500 on a 1492 link)▼
== Stability Options ==
'''More info:''' During the ppp connection when your router initially syncs up and logs in to us, the ppp connection is passed via BT. Sometimes BT can change the MTU. With this option we will accept the PPP connection from BT, but will then re-negotiate the PPP connection with your router allowing the MTU to be reduced. On TalkTalk connections the MTU is always negotiated as 1492, you need to select LCPFix and an MTU 1500 to fix this (otherwise the LNS will use 1492 when re-negotiating).▼
*Available on BT 21CN ADSL
[[Category:Line_Settings]]▼
These stability options refer to how aggressive BT's DLM is when monitoring and managing the line.
Usually we would suggest keeping it on Normal (the default). Using increased stability options increases DLM sensitivity, so can have the side effect of making your line sync at lower speeds.
== Other Line Options ==
Most of these options are available on all lines:
▲=== MTU ===
[[File:LineOptionsMTU.png]]
▲'''More
▲=== TCPFix ===
▲[[File:LineOptionsTCPFix.png|none|frame|Modifies the MSS in TCP packets so that it does not exceed the MRU.]]
▲=== MRUFix ===
▲[[File:LineOptionsMRUFix.png|none|frame|When sending IP traffic, ignore the MRU we receive during PPP negotiation. This can save a LCP
▲=== LCPFix ===
▲[[File:LineOptionsLCPFix.png|none|frame|Re-negotiates PPP
▲'''More
▲=== FastTimeout ===
▲[[File:LineOptionsRate100.png|none|frame|Uses
▲'''More
==LNS reset==
From time to time there are upgrades to the LNSs. This is usually to add new features, or fix bugs.
Upgrading an LNS is very quick, and it is only off line for under a second. However, it does mean stopping all of the sessions on the LNS, which means we will force your DSL service to reconnect. You can set the preferred time for the reconnect to happen, the default is 1AM.
{{CPbox|#Click on the line you want to view
#Click on your login (e.g. abc@a)}
#Set the 'LNS reset'. You can choose a time between 1AM and 6AM}}
We have more info here: [[LNS Switches]]
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