I have a connection trunk quality problem between a 3640 and 3662 (or 3745) routers. After setting up the connection trunk, I tested the quality by sending a 1KHz tone (using an analog tester). Here is the result: -
Transmit........Receive.........Result
---------------------------------------
3640(NM-2V).....3662(NM-2V).....Tone receive good
3640(NM-2V).....3745(NM-HD-2V)..Tone receive good
3662(NM-2V).....3640(NM-2V).....Tone receive with noise
3745(NM-HD-2V)..3640(NM-2V).....Tone receive with noise
This problem doesn't happens if the connection trunk is between a 3662 and 3745 routers as the result below indicates.
Transmit........Receive.........Result
--------------------------------------
3662(NM-2V).....3745(NM-HD-2V)..Tone receive good
3662(NM-2V).....3745(NM-2V).....Tone receive good
3745(NM-HD-2V)..3662(NM-2V).....Tone receive good
3745(NM-2V).....3662(NM-2V).....Tone receive good
Can someone tell me how can I solve this problem?
Here's what I have configured inside the routers: -
On the 3640 (with NM-2V and VIC-2E/M) -
-------------------------------------
!
interface Ethernet0/0
ip address 10.81.1.2 255.255.0.0
full-duplex
!
..
..
voice-port 1/0/0
echo-cancel coverage 32
no comfort-noise
timeouts wait-release 3
connection trunk 9001
operation 4-wire
type 2
signal immediate
!
..
..
dial-peer voice 9000 voip
destination-pattern 900.
session target ipv4:10.81.1.1
dtmf-relay h245-alphanumeric
codec g726r24
ip precedence 5
!
dial-peer voice 8001 pots
destination-pattern 8001
port 1/0/0
!
On the 3660 (with NM-2V and VIC-2E/M)
-------------------------------------
!
interface Ethernet6/1
ip address 10.81.1.1 255.255.0.0
full-duplex
!
..
..
voice-port 5/0/0
operation 4-wire
type 5
signal immediate
input gain 2
echo-cancel coverage 32
echo-cancel suppressor 9
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 8001
!
dial-peer voice 9001 pots
destination-pattern 9001
port 5/0/0
!
dial-peer voice 8000 voip
destination-pattern 800.
session target ipv4:10.81.1.2
dtmf-relay h245-alphanumeric
codec g726r24
ip qos dscp cs5 media
no vad
!
Thanks very much.
