Checking Static Ip Address Settings; Eliminating Dns Or Other Connectivity Errors; Verifying Voice Vlan Configuration - Cisco ATA 190 Administration Manual

ATA 190 Resets Unexpectedly
The ATA 190 sends messages with request type 151 to renew the DHCP address leases. If the DHCP
server expects messages with request type 150, the lease will be denied, forcing the ATA 190 to restart
and request a new IP address from the DHCP server.

Checking Static IP Address Settings

If the phone has been assigned a static IP address, verify that you have entered the correct settings. See
Understanding Phone Configuration Files, page 2-3

Verifying Voice VLAN Configuration

If the ATA 190 appears to reset during heavy network usage (for example, following extensive web
surfing on a computer connected to same switch as phone), it is likely that you do not have a voice VLAN
configured.
Isolating the phones on a separate auxiliary VLAN increases the quality of the voice traffic.

Eliminating DNS or Other Connectivity Errors

If the phone continues to reset, follow these steps to eliminate DNS or other connectivity errors:
Procedure
Use the IVR to reset phone settings to their default values. See
Step 1
Phone Setting, page B-1
Modify DHCP and IP settings:
Step 2
a.
b.
c.
On the Cisco Unified Communications Manager server, verify that the local host files have the correct
Step 3
Cisco Unified Communications Manager server name mapped to the correct IP address.
From Cisco Unified Communications Manager, choose System > Server and verify that the server is
Step 4
referred to by its IP address and not by its DNS name.
From Cisco Unified Communications Manager, choose Device > Phone and verify that you have
Step 5
assigned the correct MAC address to this Cisco Unified IP Phone. For information about determining a
MAC address, see
Step 6 Power cycle the phone.
Cisco ATA 190 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)
D-6
for details.
Disable DHCP.
Assign static IP values to the phone. See
instructions. Use the same default router setting used for other functioning ATA 190.
Assign TFTP server. Use the same TFTP server used for other functioning ATA 190.
Determining the MAC Address of an ATA 190, page
Chapter D
for more information.
Accessing the IVR and Configuring Your
Understanding Phone Configuration Files, page 2-3
Troubleshooting and Maintenance
for
2-7.
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