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68P64115A21–B
Figure 1-1: Null Modem Cable Detail
Sept 2003
LMF Software
The Local Maintenance Facility (LMF ver. 2.16.1.2.08) application
program is a graphical user interface (GUI) based software tool. This
product is specifically designed to provide cellular communications field
personnel with the capability to support the following CDMA Base
Transceiver Station (BTS) operations:
Installation
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Maintenance
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Calibration
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Optimization
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Ethernet LAN Transceiver
PCMCIA Ethernet Adpater + Ethernet UTP Adapter: 3COM Model –
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Etherlink III 3C589B
10BaseT/10Base2 Converter
Transition Engineering Model E–CX–TBT–03 10BaseT/10Base2
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Converter
NOTE
Xircom Model PE3–10B2 or equivalent can also be used to
interface the LMF Ethernet connection to the frame.
3C–PC–COMBO CBL
Connects to the 3COM PCMCIA card and eliminates the need for a
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10BaseT/10base2 Converter.
RS–232 to GPIB Interface
National Instruments GPIB–232–CT with Motorola CGDSEDN04X
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RS232 serial null modem cable or equivalent; used to interface the
LMF to the test equipment.
Standard RS–232 cable can be used with the following modifications
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(see Figure 1-1):
– This solution passes only the 3 minimum electrical connections
between the LMF and the General Purpose Information Bus (GPIB)
interface. The control signals are jumpered as enabled on both ends
of the RS–232 cable (9–pin D). TX and RX signals are crossed as
Null Modem effect. Pin 5 is the ground reference.
– Short pins 7 and 8 together, and short pins 1, 4, and 6 together on
each connector.
9–PIN D–FEMALE
5
GND
3
RX
TX
2
7
RTS
8
CTS
RSD/DCD
1
4
DTR
6
DSR
1X SC 4812T-MC Multicarrier BTS Optimization/ATP
Required Test Equipment and Software
ON BOTH CONNECTORS
SHORT PINS 7, 8;
SHORT PINS 1, 4, & 6
9–PIN D–FEMALE
GND
5
TX
2
RX
3
RTS
7
CTS
8
RSD/DCD
1
DTR
4
6
DSR
FW00362
1-9
1
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