Meridian America 21 Manual De Usuario

Descargar
Página de 867
PRACTICE 553-2201-182
Table 1-O
RETURN LOSS (In-Service Requirements)
CONNECTION FROM
CIRCUIT
E C H O
LOW/HIGH
NOTES
4W VNL TIE
TERMINATION
RETURN
S I N G I N G
TRUNKTOTHE
L O S S
RETURN
FOLLOWING:
 LOSS
4W VNL Tie Trunk
(through balance)
4W legs of Hybrid
terminated in
1.3
4W Non-VNL Tie Trunk
   2.16
(terminal balance)
 at distant PBX
2 2
1.3
2W Non-VNL Tie Trunk
(terminal balance)
  + 2.16
18
1.5
 at distant PBX
CO or FX Trunk (terminal
balance)
PBX Station Line (terminal
balance)
900R   2.16 
 at
c o
 + 2.16
18
2.5
2 4
1.4
SL-1 Station Line (terminal
balance)
2 4
1.4
PBX Station Line (terminal
Station off-hook
12
balance)
1.4
Note 1: 
Reference impedance is 
   2.16 
Note 
2: Reference impedance is 
   2.16 
Note 
3: Switchable pads set for nominal loss of 1 
Note 4: 
Switchable pads set for nominal loss of 3 
Note 5: 
If facility 
 
is less than 2 
 or adequate impedance correction is not 
nominal loss has to be increased to 3 
 by switching in the 2 
 pad.
Table 1-P
HARMONIC DISTORTION
BANDWIDTH
MAX. LEVEL
TEST SIGNAL
OF
DISTORTION
INPUT LEVEL
PRODUCT
4
200 to 4600
0
 
 
 
Page l-6