Technical data

Chapter 4. Configuring Special Features 97
If you don't get a dial tone it could be one of the following:
• Router is powered off or lost power
• Local phone cord is not plugged in
• Voice PVC is not set in the router or is wrong
• WAN link is down (LINK LED should be solid green)
• DSLAM is not provisioned for the second PVC
• Voice gateway is not connected or provisioned
• ATM network is down between the DSLAM and voice gateway
• If you hear a surging sound the Gateway maybe sending compressed data (ADPCM). Have NSP change
to PCM.
The ifs command can be used to show the voice pvc and current bandwidth:
•ifs
• Interface Speed In % Out % Protocol State Connection
• ETHERNET/0 10.0mb 0%/0% 0%/0% (Ethernet) OPENED
• SDSL/0 384kb 0%/0% 0%/0% (ATM) OPENED
• ATM-VC/1 384kb 0%/0% 0%/0% (ATM) OPENED to internet
• ATM-VOICE/2 384kb 0%/0% 18%/12% (ATM) OPENED
• CONSOLE/0 9600 b 0%/0% 0%/0% (TTY) OPENED
Debug commands:
• ifs - shows if the data and Voice PCV's are configured and percent loading ato voice x*y - used to change
the voice PVC for ATM routers (ATM basedrouters)
• frame voice x - used to set the DLCI for voice (Frame relay routers)
• sd stats - Shows CRC and line errors if ATM
• frame stats - Shows errors if Frame reply
You can use the Port Monitor GUI program to see the voice PVC and the last event message. Each voice call
takes about 80kb of bandwidth when the phone goes off hook