Meridian America 21 Manual De Usuario

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

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