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New Member

static noise on outbound calls from CME 4.0.

I have CME 4.0 on a 2801 with 12.4(4)XC ipvoice and 7 channels of a T1 ISDN PRI on an mft card. On my 7970 phones, which are running the latest code, when I make outbound calls to the PSTN I hear a short lived static sound usually during the beginning of the call, but often at intervals during a conversation. I have searched this forum but cannot seem to find anyone with a similiar issue. I have included relevant portions of my config. Recommendations welcome:

network-clock-participate wic 1

network-clock-select 1 T1 0/1/0

isdn switch-type primary-ni

controller T1 0/1/0

framing esf

linecode b8zs

pri-group timeslots 1-7,24

interface Serial0/1/0:23

no ip address

encapsulation hdlc

isdn switch-type primary-ni

isdn incoming-voice voice

isdn supp-service name calling

no cdp enable

dial-peer voice 5 pots

description ** T1 PRI pots dial-peer **

destination-pattern 9911

port 0/1/0:23

forward-digits 3


dial-peer voice 6 pots

description ** T1 PRI pots dial-peer **

destination-pattern 9T

port 0/1/0:23


dial-peer voice 7 pots

description ** T1 PRI pots dial-peer **

incoming called-number .


port 0/1/0:23

voice-port 0/1/0:23

Thanks in advance,


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New Member

Re: static noise on outbound calls from CME 4.0.

I do not dee your DSP resources and I thought you can not do voice on a 2801 the processor power is too weak. I have seen this issue in FXO ports and the DSP was bad also use a T train IOS 12.4(3b) is also a good one.