Carrier Access Access Bank II SNMP - Manual (Page 58)

RS-232 Management
9/24/01 5-11
Table 5-6: CAC Local Management Adapter Cable Pin Assignments
5.7.3 Null Modem Adapter
Converting the Access Bank II SNMP from local management to dial-in/dial-out remote manage-
ment and/or alarm reporting requires using the 25-pin male to 25-pin male CAC Null Modem
Adapter (P/N 005-0002) included with each Access Bank II SNMP purchase. The Null Modem
Adapter is equipped with a DB25 RS-232 male connector on the DTE end and an RS-232 DB25 male
connector on the DCE end. The DTE DB25 male connector can be connected either to the 25-pin
DCE female connector on the CAC Local Management Cable described above, or to the 25-pin
female connector on the RS-232 data connector on the DCE end of the CAC Dual RS-232 DCE Data
and Management Cable. The 25-pin DCE female RS-232 end is for attachment to a Hayes-compati-
ble modem for dial-in/dial-out to a remote printer or pager, or to a remote 486 or higher PC with the
MS Windows-based Remote Monitor software or MS Windows Hypterterm (or compatible) VT100
emulation program installed. These programs are included with every Access Bank II SNMP.
Figure 5-6 shows the connection points.
Figure 5-6: CAC Null Modem Adapter
The CAC Null Modem Adapter is built according to the pin assignments defined in Table 5-7.
Designation DCE-DB25
(female) D-Sub-26
(male) Paired Signals
(Not required)
Shield 1+ (shield) 1+ (shield)
Ground 7 7
Secondary TXD 2 14
Secondary RXD 3 16 °
Secondary RTS 4 19
Secondary CTS 5 13 °
Secondary DTR 20 10
Secondary CD 8 12 °
GND
RXD
TXD
CTS
RTS
CD
DTR
7 GND
2 TX
3 RX
4 RTS
5 CTS
20 DTR
8 CD
7 GND
3 RX
2 TX
5 CTS
4 RTS
8 CD
20 DTR
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) DTE DB25 (male)
Remote Management
(modem)
DB25 M to DB25 M
Null Modem