Preliminary Information
AC Electrical Characteristics
†
Characteristics
1
2
3
4
5
6
7
8
Ringing Voltage
Ringing Frequency
Operating Loop Current
Off-Hook DC Resistance
Operating Loop Resistance
On-Hook Leakage Current
Ring Ground Sink Current
Tip and Ring AC Impedance
IRG
IL
RT
RL
MH88630
Sym
VR
Min
40
Typ
‡
90
20
Max
130
Units
V
rms
Hz
Test Conditions
Ringing Type A, RS-464
18
70
300
2300
3
100
600
mA
Ω
Ω
µA
mA
Ω
@18mA
@18mA
RINGND = 5.0Vdc
-48VDC with 200Ω in
series on Ring lead
with 10kΩ + 1.0µF
inparallel with Tip and
Ring
200-1000Hz
1000-4000Hz
200-1020Hz
1020-3020Hz
200-500Hz
500-1000Hz
1000-3400Hz
200Hz
1000Hz
3000Hz
200-1000Hz
1000-4000Hz
200Hz
300Hz
3000Hz
3400Hz
See Note 1
C-Message
9
Longitudinal Balance
metallic to longitudinal
longitudinal to metallic
60
40
58
53
20
26
30
THL
16
18.5
34
30
18
21
0.05
0.05
0.05
0.05
8
PSRR
40
6
13
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dBrncO
10
Return Loss
Trunk to Line
11
Transhybrid Loss (single
frequency) into 600Ω
Transhybrid Loss (single
frequency) into AT&T
Compromise
Frequency response (Output
relative to 1kHz,
VTR/VR and VX/VTR)
12
THL
16
18
-0.15
-0.10
-0.10
-0.15
13
14
15
16
Idle Channel Noise
Power Supply rejection ratio
Analog signal overload level
(adjustable gain)
dB
dBm
1kHz, 0dBm=0.775Vrms
into 600Ω.
† AC Electrical Characteristics are over recommended operating conditions unless otherwise stated.
‡ Typical figures are at 25°C and are for design aid only: not guaranteed and not subject to production testing.
Note 1: Input 0dBm at VTR, or input 0.775Vrms at VR. TR-600Ω termination
2-221
MITEL [ MITEL NETWORKS CORPORATION ]
