Carrier Access Access Bank II SNMP - Manual (Page 59)

5-12 9/24/01
Table 5-7: Null Modem Adapter Pin Assignments
5.7.4 Straight Adapter
The CAC Straight Adapter (P/N 005-0007-25M-9F-Straight) permits connecting the 9-pin COM1
communication port on a local Laptop computer to the 25-pin DCE data female connector on the
Dual RS-232 DCE Data and Management Cable, or to 25-pin female DCE connector on the Local
Management Cable. Figure 5-7 shows these connections points.
Figure 5-7: CAC Straight Adapter
The CAC Straight Adapter is built according to the pin assignments listed in Table 5-8.
Designation DCE DB25 (male) DTE DB25 (male) Paired Signals
(Not required)
Shield 1+ (Shield) 1+ (Shield)
Ground 7 7
Secondary TXD 3 2
Secondary RXD 2 3 °
Secondary RTS 5 4
Secondary CTS 4 5 °
Secondary DTR 8 20
Secondary CD 20 8 °
GND
TXD
RXD
RTS
CTS
DTR
CD
7 GND
2 STXD
3 SRXD
4 SRTS
5 SCTS
20 SDTR
8 SCD
5 GND
3 TX
2 RX
7 RTS
8 CTS
4 DTR
1 CD
BRAID
1 SHIELD 1 SHIELD
Carrier Access female
DB25 DCE Mgt. cable
005-0003 or female
DB25 DCE user data
cable 005-0001
DCE DB25 (male)
DCE Female
DB-9
COM-1 Management
Local laptop
DB25 M to DB25 M
Null Modem
COM-1 Management
Connection