Quantization Distortion Units; Stability Loss - Nortel Meridian 1 Planning And Installation Manual

Page 406 of 590

Quantization Distortion Units

Stability loss

553-3021-209 Standard 1.00
Appendix A – General information for the United Kingdom
From
Digital Trunk
Digital TIE
Other
Other
Other
The figures listed above are for both directions of transmission. Other
includes all ports except Digital Trunk and Digital TIE, such as Analog
Trunk, Analog TIE, Analog Extension, and Digital Extension.
Digital TIE ports (both directions of transmission) and digital trunks (transmit
path only) have bit integrity between the trunk interface and switching matrix.
The following table gives worst-case figures for receive to transmit loss
(including input and output loss) under impedance mismatch conditions
(200¾ and 1200¾) for all permitted connections between 2-wire and 4-wire
ports. The sum of stability losses for all closed four-wire transmission loops
within a private branch network must exceed 6dB.
July 1999
To
Digital TIE
Digital TIE
Digital Trunk
Digital TIE
Other
QDUs
0.7
0
1.2
0.5
1.0