Keymile SUPM1 - Voice Transmission Specification

User Manual
SUPM1
page 14 of 94© KEYMILE December 2015 EN/LZTBU 372 129/1 RC
94
Functions and Specifications
3.4 Voice Transmission Specification
Table 5: Voice transmission specification
Feature Rating or standard
Voice impedance The following voice impedances are supported.
Refer to Q.552; 2.2.1.1; Table 1:
All impedances are configurable in the element manager.
Return loss Q.552; 2.2.1.2; Fig. 1
Impedance unbalance about earth Q.552; 2.2.2; Fig. 2
Relative voice levels
- Input (Subscriber → SUPM1):
- Output (SUPM1 →Subscriber):
- Selectable in steps of 0.5 dB
Q.552; 2.2.3.1
-4 … +4 dBr
-10 … 0 dBr
Tolerances of relative levels Q.552; 2.2.3.2
Variation of gain with input level Q.552; 3.1.1.4; Fig. 4
Loss distortion with frequency Q.552; 3.1.1.5; Fig. 5a, b
Absolute group delay Q.552; 3.1.2.1
Group delay distortion with frequency Q.552; 3.1.2.2
Crosstalk Q.552; 3.1.4
Input signals above 4.6 kHz Q.552; 3.1.6.1
Level of individual components Q.552; 3.1.7.1
R
S
R
P
C
P
ID R
S
[Ω] R
P
[Ω] C
P
[nF] Codec
a 900 0 0 A-law
b 600 0 0 A-law
c 600 0 0 u-law
d 200 680 100 A-law
e 370 620 310 A-law
f 220 820 115 A-law
g 300 1000 220 A-law
h 270 750 150 A-law