3Com 5000 Series Installation Manual page 40

3Com Router 5000 Family
Installation Guide
Attribute
Protocol
Note:
When using the DB50 connector, you cannot connect RS530 DCE cable.
Synchronous/asynchronous mode
Synchronous/Asynchronous serial interface can work in either synchronous or
asynchronous mode. Different signaling standards are supported in these two modes.
V.35 and V.24 (RS232) support synchronous operating mode, while V.24 (RS232),
support the asynchronous operating mode. The maximum transmission distance and
baud rate of the signal vary with the operating mode.
Table 4-7 Transmission rate and transmission distance of V.24 (RS232)/V.35 cable
Baud rate (bps)
2400
4800
9600
19200
38400
64000
115200
-
Synchronous
PPP
MP
LAPB
HDLC
X.25
Frame Relay
V.24 (RS232)
Maximum
transmission
distance (m)
60
60
30
30
20
20
10
-
3Com Corporation
Chapter 4 Installation of the Router
Description
Baud rate
(bps)
2400
4800
9600
19200
38400
56000
64000
2048000
4-13
Asynchronous
PPP
SLIP
MP
V.35
Maximum transmission
distance (m)
1250
625
312
156
78
60
50
30