[c-nsp] cisco show Interface transceiver detail

[nasrul azim]

Hi all, i'm a bit confusing to read the fiber transceiver detail. 
Which one is the correct one in brackets or outside the bracket. Whats 
the bracket means.

Thank you.


cisco#sh int gi1/16 trans det
ITU Channel not available (Wavelength not available),
Transceiver is externally calibrated.
mA: milliamperes, dBm: decibels (milliwatts), NA or N/A: not applicable.
++ : high alarm, +  : high warning, -  : low warning, -- : low alarm.
A2D readouts (if they differ), are reported in parentheses.
The threshold values are calibrated.

                            High Alarm  High Warn  Low Warn   Low Alarm
        Temperature         Threshold   Threshold  Threshold  Threshold
Port     (Celsius)          (Celsius)   (Celsius)  (Celsius)  (Celsius)
------- ------------------  ----------  ---------  ---------  ---------
Gi1/16    38.7               110.0        93.0        -3.0       -9.0

                            High Alarm  High Warn  Low Warn   Low Alarm
         Voltage            Threshold   Threshold  Threshold  Threshold
Port     (Volts)            (Volts)     (Volts)    (Volts)    (Volts)
-------  ---------------    ----------  ---------  ---------  ---------
Gi1/16   3.26                  4.00        3.70        2.90       2.80

                            High Alarm  High Warn  Low Warn   Low Alarm
         Current            Threshold   Threshold  Threshold  Threshold
Port     (milliamperes)     (mA)        (mA)       (mA)       (mA)
-------  -----------------  ----------  ---------  ---------  ---------
Gi1/16    22.0                84.0        70.0         4.0        2.0

         Optical            High Alarm  High Warn  Low Warn   Low Alarm
         Transmit Power     Threshold   Threshold  Threshold  Threshold
Port     (dBm)              (dBm)       (dBm)      (dBm)      (dBm)
-------  -----------------  ----------  ---------  ---------  ---------
Gi1/16     2.9 (  1.7)         8.1         6.9        -2.0       -4.0

         Optical            High Alarm  High Warn  Low Warn   Low Alarm
         Receive Power      Threshold   Threshold  Threshold  Threshold
Port     (dBm)              (dBm)       (dBm)      (dBm)      (dBm)
-------  -----------------  ----------  ---------  ---------  ---------
Gi1/16   -23.3 (-17.4) -       0.7        -1.0       -20.0      -24.0