[Asterisk-Users] E1 Echo

[Rich Adamson]

> >>I am beginning to wonder whether what echo IS heard is being caused by
> >>packetisation delays "in the network" - The default tap length is 128,
> >>or I believe 16ms. If something in the PSTN causes a delay more than
> >>that length (no idea what might cause that) then echo would still be
> >>heard.
> 
> We have found that a relatively innocent change by the local incumbent 
> operator has forced us to modify our pstn gateways to change from 128 
> taps to 256 taps. 

What type of a change did they make?