3Com 5000 Series Installation Manual page 48

3Com Router 5000 Family
Installation Guide
Caution:
The aforementioned cables are optional, so you have to order them in purchasing the
router if needed.
3) Connection of sync/async serial cable
Caution:
Do not hot swap the synchronous/asynchronous cable. Otherwise, the router or the
connected remote equipment may be impaired.
Follow the steps below to connect the synchronous/asynchronous cable (taking the
connection from WAN to DSU/CSU as an example):
Step 1: Check that a proper synchronous/asynchronous cable is shipped with the
router.
Step 2: Plug the DB50 connector of the cable into the interface WAN on the router.
Step 3: Connect the other end of the cable to the CSU/DSU device. (If the WAN adopts
dial-up line, connect the cable to the serial interface of the analog Modem.
II. Connecting E1 interface to DSU/CSU
1) Introduction to the E1 interface
E1 interface, which stands for channellized CE1/PRI interface, is responsible for
forwarding and processing E1 data flow, delivering CE1 access and implementing
ISDN PRI function. Its attributes are listed in the following table.
Table 4-8 E1 interface attributes
Attribute
Connector type
Interface
standard
Maximum
baud rate
DB15
G.703, G.704
2.048Mbps
3Com Corporation
4-21
Chapter 4 Installation of the Router
Description