mh89726 Mitel, mh89726 Datasheet - Page 4

• Manufacturer Part Number: mh89726
• Description: Mt8972 Loop Extender Circuits Advance Information
• Manufacturer: Mitel

MH89726/728
Note 1: The attenuation of the cable as specified by Bell System Technical Reference PUB 62411.
9-130
NOTES:
-D1, D2 IN5817 (Schottky)
-Solid jumpers used to connect the loop extender
-Dotted jumpers connect MT8972 without loop extender
MT8972
DNIC with LEC to DNIC and LEC
DNIC with LEC to DNIC with LEC
L
OUT
L
IN
CONFIGURATION
CONFIGURATION
1
21
DNIC to DNIC
DNIC to DNIC
+5V
D1
D2
Table 1 - Typical Transmission Performance at 160 kbit/s
Table 2 - Typical Transmission Performance at 80 kbit/s
Figure 4 - Typical Application of the Loop Extender
CABLE
CABLE
LE
LE
OUT2
MH89726 (160 kbit/s)
MH89728 (80 kbit/s)
IN
(6.9 dB/km at 60 kHz (Note 1)
CB
RA
Termination
(8.0 dB/km at 120 kHz)
EXTENDER
Network
LOOP
and
0.65 to 5.1 km
0.0 to 5.2 km
0.9 to 6.5 km
0.0 to 4.1 km
24 AWG
24 AWG
160 kbit/s RA = 390
80 kbit/s RA = 390
LE
OUT1
CA
(11.5 dB/km at 120 kHz)
Advance Information
(10.0 dB/km at 60 kHz)
0.33 F
2:1
CA = 22nF CB = 3.3nF
CA = 22nF CB = 1.5nF
0.65 to 4.1 km
0.0 to 3.0 km
0.5 to 3.6 km
0.0 to 3.4 km
1.0 F
26 AWG
26 AWG
Twisted Pair
Copper 24-26
Gauge