210-060 · Question #308
An engineer is configuring an analog terminal adapter with the device name ATA1CE6C773BA96 Which MAC address should the engineer use to configure the second port?
The correct answer is E. E6C773BA9601. For a Cisco ATA registered in CUCM, the second FXS port uses a derived MAC address formed by dropping the first octet of the base MAC and appending '01'.
Question
An engineer is configuring an analog terminal adapter with the device name ATA1CE6C773BA96 Which MAC address should the engineer use to configure the second port?
Options
- A1CE6C773BA96
- BATA1CE6C773BA96
- Caaaaaaaaaaaa
- Dffffffffff
- EE6C773BA9601
How the community answered
(39 responses)- B8% (3)
- C10% (4)
- D3% (1)
- E79% (31)
Why each option
For a Cisco ATA registered in CUCM, the second FXS port uses a derived MAC address formed by dropping the first octet of the base MAC and appending '01'.
1CE6C773BA96 is the base MAC address used for the first port, not the second port.
ATA1CE6C773BA96 is the device name prefix format used in CUCM, not a valid MAC address.
aaaaaaaaaaaa is not a valid or derived MAC address for any port on this device.
ffffffffff is not a complete or valid MAC address and has no relation to ATA port derivation.
Cisco ATA devices register each physical FXS port separately in CUCM. For the second port, the convention is to take the base MAC (1CE6C773BA96), remove the leading byte (1C), and append '01', yielding E6C773BA9601. This 12-character hex string becomes the MAC identifier CUCM uses to uniquely register the second port.
Concept tested: Cisco ATA second port MAC address derivation in CUCM
Source: https://www.cisco.com/c/en/us/support/docs/voice-unified-communications/cisco-ata-186/5688-ata-callmanager.html
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