Avaya MCC1 Maintenance Procedures page 41

Table 15: Quantization distortion loss (analog port-to-analog port)
Signal level
0 to -30 dBm0
-40 dBm0
-45 dBm0
Table 16, Quantization distortion loss,
analog port-to-digital port and digital port-to-analog port.
Table 16: Quantization distortion loss
Signal level
0 to -30 dBm0
-40 dBm0
-45 dBm0
1 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 5 minutes at +55 dBrnC
(decibels above reference noise with C-filter) during the busy hour.
ERL and SFRL talking state
Echo-Return Loss (ERL) and Single-Frequency Return Loss (SFRL) performance are usually dominated
by termination and/or loop input impedances. The system provides an acceptable level of echo
performance if the ERL and SFRL are met, as follows:
Table 17: ERL and SFRL performances by connection type
Type of connection
Station-to-station
Station to 4-wire trunk connection
Station to 2-wire trunk connection
4-wire to 4-wire trunk connection
Maintenance Procedures
December 2003
Distortion loss
>33 dB
>27 dB
>22 dB
on page 41 lists the quantization distortion loss in the system for
1
Distortion loss
>35 dB
>29 dB
>25 dB
ERL and SFRL performance
ERL should meet or exceed 18 dB
SFRL should meet or exceed 12 dB
ERL should meet or exceed 24 dB
SFRL should meet or exceed 14 dB
ERL should meet or exceed 18 dB
SFRL should meet or exceed 12 dB
ERL should meet or exceed 27 dB
SFRL should meet or exceed 20 dB
Maintenance strategy
Signaling
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