PRACTICE 553-2201-182
Table 1-C
OVERLOAD LEVELS
TYPE OF
CIRCUIT
NOMINAL OVERLOAD LEVEL
(dBm)
RECEIVE
(AID)
TRANSMIT
(D/A)
Line
Trunk
Note: Receive and Transmit relate to Switch.
Table 1-D
TRACKING (LINEARITY)
INPUT SIGNAL
(dB)
BELOW OVERLOAD
TRACKING ERROR
(dB)
MAXIMUM
AVERAGE
+3
to -40
&OS
i-o.25
. .
-40 to -53
k1.0
+0.5
Note
I:
Signal at 1020 Hz.
Note 2: Maximum specification for 99% of all connections.
Table 1-E
TRANSHYBRID LOSS
TWO-WIRE PORT
TRANSHYBRID LOSS
(dB)
200 to 3400 Hz 500 to 2500 Hz
Line
>17 >19
Trunk
>18 >21
Note 1: This parameter is for
EIA-compatible
trunks only.
Note 2: Measurement of transhybrid loss
(THL)
is made from
equal-level (transmit and receive) four-wire port towards the
two-wire port.
Note 3: Two-wire port compromise impedance: 600
R.
or 350
R
in
series with
160
Iz.
0.21
UF.
Page l-2