Background Noise on All Calls and Phones - IP406v2 2

[MAlcala]

We have background noise on all calls between extensions and inbound/outbound calls. This background noise is present on all digital and IP hard/soft phones.

It would appear that the noise comes from the pbx. How do you solve this issue?

We are using a IP406v2 v3.1(56) not grounded with:
ANALOGUE POTS2 3.1 (56)
Digital DCP 8 3.1 (56)
4620 Digital handsets
5620 IP hard phones v2.3000
IP soft phones v3.1.15
SBC provided Analog lines (USA, Pasadena, CA)
Tx gain 1.0 DB
Rx gain 0.0 DB
Echo cancellation = 64 ms
Allow Direct Media Path = unchecked

 

[TheDoz]

Try unplugging everything but your control unit(IP Office).
If you still have noise, try switching out the power supply with one of the other exspansion units. You may have one unit messing up the others.

"A politician is a fellow who will lay down your life for his country.

 

[crumthwacket]

If you were to contact Avaya and tell them the control isn't grounded and you're experiencing these symptoms they would tell you to ground the system and then call back.