Raisecom iTN2100 - Table 19-12 Relationship between the Maximum Speed and Occupied Transmission Bandwidth of RS232 Interfaces; Table 19-13 Comparison on Metrics of RS485 and RS422 Standards; Table 19-14 FXS;FXO Interface Pins of the OPCOM3500 E-MULTI

Raisecom
iTN2100 (P100R002) Hardware Description
19 Multi-service cards
Raisecom Technology Co., Ltd.
214
Table 19-12 list the relationship between the maximum speed and occupied transmission
bandwidth of RS232 interfaces
Table 19-12 Relationship between the maximum speed and occupied transmission bandwidth of
RS232 interfaces
RS232 speed
Occupied transmission
bandwidth
Number of
occupied timeslots
Frame
structure
9600 Kbit/s
64 Kbit/s
1
Framed
19200 Kbit/s
128 Kbit/s
2
Framed
130000 Kbit/s
2048 Kbit/s
32
Transparently
transmission
Table 19-13 compares metrics of RS485 and RS422 standards.
Table 19-13 Comparison on metrics of RS485 and RS422 standards
Parameter
RS422
RS485
Maximum transmission distance (m)
1200
1200
Maximum transmission speed (Mbit/s)
10
10
Maximum common-mode voltage (V)
-7 to +7
-7 to +7
Dropout voltage of differential output voltage
2–10
1.5–5
Internal resistance of sender (Ω)
≥ 100
≥ 60
Internal resistance of receiver (KΩ)
4
12
Differential voltage range of receiver (mV)
±200
±200
Interface pins
Table 19-14 describes FXS/FXO interface pins of the OPCOM3500E-MULTI. Each RJ45
outputs 4-way voice services.
Table 19-14 FXS/FXO interface pins of the OPCOM3500E-MULTI
RJ45
RJ45 pin No.
Line name
Description
1
TIP1
1
st
-way voice
2
RING1
3
TIP2
2
nd
-way voice
4
RING2
5
TIP3
3
rd
-way voice