Broadband annex M
Annex M is a variation of the ADSL2+ standard that allows more uplink on the line but in return sacrifices some of the downlink speed. This is a standard option on our BE lines, but on BT 21CN lines this is a chargeable extra service. It costs £11.75†.
How to order
When your order broadband service you are asked if you would like enhanced care service on the line or not. You can add annex M to an existing line or remove it later if you wish using the order pages. Removing annex M cost £11.75†.
Note: Your equipment must support ADSL2+ and Annex M to take advantage of this service. Very long lines may get little or no benefit from this service.
Some routers do have problems negotiating Annex M with the DSLAM equipment in the exchange. For example, the ZyXEL P660R-D1 has problems with some models of DSLAM. -do contact support for help if needed.
