Troubleshooting guide

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Cisco Broadband Local Integrated Services Solution Troubleshooting Guide
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Chapter 9 Troubleshooting Cisco Media Gateways
Physical Indicators
Echo Is Heard on a Voice Call
Ensure that the call has the ECAN feature enabled. If the echo delay is longer than the provision tail
length, ECAN does not work. Use the VISM cnfecantail command to configure a larger value for the
tail length.
VISM Card LEDs Are Not Lighted
The VISM card may not be inserted completely in the slot. Ensure that the VISM card is seated in the
slot correctly, with top and bottom half portions of the VISM card making electrical contact with the
backplane.
Firmware Does Not See the Card Insert Bit Status As Set
This symptom can also indicate a bad VISM card or bad MGX slot.
Physical Indicators
VISM Card LED Indications
The VISM card has three card status LEDs and 8 line status LEDs, organized as follows:
VISM Front Card LEDs
Line LEDs
VISM has eight line LEDs which indicate the following:
Table 9-7 VISM Card Front LEDs
LED COLOR INDICATION
Green Active state.
Orange Standby state or when the VISM card DSPs are getting downloaded
as part of the card booting up.
A standby LED will be blinking orange when the card is in the boot
state.
Red Fail state. Red LED will be lit when the card is in the FAIL state.