ATA 188 Duplex and Speed Change

Cisco ATA 188 Ethernet port duplexity and speed can be configured from the Cisco ATA web configuration page (http://<ATA-IP-Address>), provided the hardware version number on Cisco ATA is 0x0009 or above (version can be checked from the Device information page, http://<ATA-IP-Address>/DeviceInfo). The ATA 188 has two Ethernet RJ-45 10/100 BASE-T ports, both with configurable duplex and speed. One is used as an uplink connecting to the switch and the other as a data port for connecting to a PC. The IP Address of the ATA device (ATA-IP-Address) can be obtained from the connected switch using show cdp neighbors <interface_type> <module/port> detail command.

The speed & duplex of the Ethernet ports can be configured by changing the values of Switchports parameter on the http://<ATA-IP-Address>/NetCfg page.

Applicable Bits

• Bits 0-3 are for the PC port

• Bits 4-7 are for the uplink port

Bit Values

• 0=10 Mbps, half duplex

• 1=10 Mbps, full duplex

• 2=100 Mbps, half duplex

• 3=100 Mbps, full duplex

• 4 = AUTO detect

• Other bit values are not valid

By default the ATA works in 10Mbps, half duplex (0x00000000). The Switchports parameter can be changed to 0x000000FF for 100Mbps, full duplex & 0x00000022 for 100Mbps, half-duplex. After the value has been entered, click on apply. Switch OFF the ATA power and then switch it back ON for the configuration to complete. After switching ON, the Function button on top of the ATA blinks quickly indicating that the ATA is upgrading the configuration.

ATA 188 is past End-of-Life and probably out of most networks, but it could perform auto-negotiation for duplexity and speed and is capable of 10/100 Mbps, full-duplex operation. The Cisco ATA 186 on the other hand is fixed at 10 Mbps, half-duplex operation.