Hi,
I have a problem with Voice ports (VIC-2E/M) on our router (2811).
When we send RTP packages the voice-port turns the E-lead on and off every ~100 ms (The LED on the VIC2-module flashes red).
This failure occurs with the same pattern every time:
RTP stream 1: Everything works.
RTP stream 2: LED flashes red. Audio is "sliced".
RTP stream 3: LED flashes red. Audio is "sliced".
RTP stream 4: Everything works.
RTP stream 5: LED flashes red. Audio is "sliced".
RTP stream 6: LED flashes red. Audio is "sliced".
RTP stream 7: Everything works.
Etc...
Restarting the E/M port "resets" the pattern:
RTP stream 1: Everything works.
RTP stream 2: LED flashes red. Audio is "sliced".
Cisco-config: Voice interface shutdown/no shutdown.
RTP stream 3: Everything works. (We would expect Flashing LED if we did not shutdown).
Other information:
- We have two VIC-2E/M card in the same router. This error is on boths cards.
- Adjusting the "timing hangover" only changes the frequncy of the flashing LED - it does not remove it.
- We have a working voice-port configuration. Aplying ths does NOT help.
- The RTP stream to the router is valid.
- The router has a newer IOS 12.4(12.12)T.
The voice-port configuration is listed below:
voice-port 0/0/0
voice-class permanent 1
auto-cut-through
operation 4-wire
type 3
signal lmr
lmr m-lead audio-gate-in
lmr e-lead voice
lmr duplex half
lmr led-on
input gain auto-control
output attenuation -11
no comfort-noise
timeouts call-disconnect 3
timing hookflash-in 30
timing hangover 100
timing ignore m-lead 100
connection trunk 240
description *** E&M 0/0/0 ***
dial-peer voice 240 voip
description *** LMR bound to 0/0/0 ***
destination-pattern 240
session protocol multicast
session target ipv4:234.1.1.191:20200
codec g711ulaw
vad aggressive
I hope you are able to help.
