DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Architecture
1-41Protocols
1
Quantization Distortion Loss
Table 1-17 lists the quantization distortion loss in the system for analog port to
analog port.
Table 1-18 lists the quantization distortion loss in the system for analog port to
digital port and digital port to analog port.
Terminating Impedance: 600 Ohms nominal
Trunk balance impedance (selectable): 600 Ohms nominal or complex Z [350 Ohms + (1 k
Ohms in parallel with 0.215uF)]
Impulse Noise
On 95% or more of all connections, the impulse noise is 0 count (hits) in five
minutes at +55 dBrnC (decibels above reference noise with C-filter) during the
busy hour.
Table 1-17. Quantization Distortion Loss
Analog Port-to-Analog Port
Signal Level Distortion Loss
0 to -30 dBm0 >33 dB
-40 dBm0 >27 dB
-45 dBm0 >22 dB
Table 1-18. Quantization Distortion Loss
Analog Port-to-Digital Port or
Digital Port-to-Analog Port
Signal Level Distortion Loss
0 to -30 dBm0 >35 dB
-40 dBm0 >29 dB
-45 dBm0 >25 dB
