Cisco Cisco IOS Software Release 12.4(23)

Following are command output examples:

1) Following is an example of normal output for FXO and EVM FXS ports. 

For FXO ports, the value is usually 0x01 but for EVM FXS the value can be different. When you 
run the above-mentioned command, the expected output is that a single octet is displayed and only 
for register 39. (This command does not work for VIC-4FXS and VIC2-xFXS modules).

router#term mon

router#test voice port 0/3/3 si-reg-read 39 1

router#

Values read from SiLabs Codec connected to DSP 0, channel 11:

--------------------------------------------------------------

Register 39 = 0x01

2) Following is an example of output for FXO and EVM FXS ports that indicates that the symptom 
has occurred. Note that the exact output for the register values is different, but when the symptom 
occurs, different lines with information are displayed as shown below: 

router#term mon

router#test voice port 0/3/3 si-reg-read 39 1

router#

Values read from SiLabs Codec connected to DSP 0, channel 11:

--------------------------------------------------------------

Register 39 = 0x5CB8

Register 40 = 0xFFFF

Register 41 = 0xFFFF

Register 42 = 0xFFFF

3) Following is an example of normal output for FXS and analog E&M modules. The values 

that are listed in a normal case may be different, but only four registers of a single 

octet should be displayed.

Values read from PEB2465 Codec connected to DSP 02 (channel 0): 

--------------------------------------------------------------- 

Extended Register Values (XR4..XR1) = 00, CC, 50, 11

4) Following is an example of output for FXS and analog E&M modules that indicates that the 
symptom has occurred.

Values read from PEB2x65 Codec connected to DSP 0, channel 1: 

------------------------------------------------------------ 

Extended Register Values (XR4..XR1) = D001, B83C, 3FF1, 63AC 

CSCse34097

Symptoms: When a voice call is made to one of the busy channels of BRI/PRI port, the call gets 
rejected, and then another call is made to the available port. The call gets connected, and the user 
hears an annoying hissing sound. 

Conditions: The procedure to recreate this scenario is the following: 

Phone a & b ---OGW --VoIP --TGW(2611) --BRI/PRI --PBX -- phone c & d

Phone a calls phone c;