[Asterisk-Users] annoying static when calling from legacy PBX -> * ZAP interface

[Bernie Ott]

Hi all.

I've got an Auerswald 4410USB (
http://www.auerswald.de/int/products/c4410usb.htm ) which I connected
to my 2nd ZAP interface (s0 <-> Zap) via Crossoverr ISDN cable (which
I crimped myself, I guess that's not the source of my trouble).

Now what is annoying however, there is a very loud and very distinct
static noise that is audible to the external party (outside of my *
box within the telco network). The internal party does hear static,
but MUCH more silent one.

The * Box itself has 4 PCI slots, 3 of which are full: 10/100MBit-NIC,
1-port-ZAP, 1-port-ZAP. no VGA card, 1 Harddisk, nothing else.

Now - what can be the issue here? Any help and pointers are very appreciated!


-- 
best,

Bernie