Specifications

20 AT-9900 Series Switch
C613-03084-00 REV A
Figure 1-7: Pin wiring diagram for a DCE RS-232 Terminal Port (DB9 male connector) male
to male modem cable.
For more information on pin assignments for the RS-232 Terminal Port see
“RS-232 Terminal Port (ASYN0)” on page 18.
Cables for RJ-45 Ethernet LAN interfaces
Warning Do not plug a phone jack into any RJ-45 port because you could
damage the switch. Use only twisted pair cables with RJ-45 connectors.
For 10BASE-T/100BASE-TX/1000BASE-T connections, a twisted pair cable
with four pairs and RJ-45 connectors must be used.
The cables used for network connections and testing of RJ-45 interfaces are
listed below.
Notes:
(1) → Output from switch; ← Input to switch
(2) Cable version 1.0.
3 (TXD)
2 (RXD)
1 (DCD)
5 (GND)
4 (DTR)
8 (CTS)
7 (RTS)
9 not connected
6 n
ot connected
4
3
6
7
5
2
8
1
RJ-45
(to switch/DTE)
DB9 Male
(to modem/DCE)
not connected
→ (TXD)
← (RXD)
← (CD)
(GND)
→ (DTR)
← (CTS)
→ (RTS)
not connected
RJ45DTEDB9Msw
Cable
Pin 9
Pin 6
Pin 5
Pin 1
DB9 Male Pin View
1
8
RJ-45 Pin View
Table 1-5: Cables for RJ-45 LAN interfaces
Purpose Interface type Cable type Pairs Pin assignment
Network 10/100/1000BASE Straight-through Four See Table 1-6 on page 21
Test 10/100/1000BASE Crossover or straight through Four See Table 1-7 on page 22
or Table 1-6 on page 21