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| Chapter 1 – Description & Specifications | |
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| LED Indicators |
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| TD. Transmit Data. | Lit when modem is transmitting data. |
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| RD. Receive Data. | Lit when modem is receiving data. |
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| CD. Carrier Detect. | Lit when data connection has been established. |
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| LS. Line Status. | Continuous “on” state indicates that the wireless modem is not registered |
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| on the network. |
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| Flashing state indicates registration on network. |
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| Off state. Modem is off (not ready) or in download mode. |
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| TR. Terminal Ready. | Commonly called “Data Terminal Ready.” This is a readiness signal from |
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| the PC. |
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| PWR. Power. | Indicates presence of DC power when lit. |
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RS232 15-Pin Connector Pinout
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| 5 |
| 1 |
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| 10 | 6 |
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| 1 5 |
| 11 |
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| PIN | EIA | CCIT | Designation | |||
| 1 | DCD | 109 | Data Carrier Direct | |||
| 6 | RX | 104 | Receive Data (out) | |||
| 2 | TX | 103 | Transmit Data | |||
RS | 8 | DTR | 108.2 | Data Terminal Ready | |||
9 | GND |
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| Signal Ground | |||
232 |
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7 | DSR | 107 | Data Set Ready | ||||
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| 12 | RTS | 105 | Request to Send | |||
| 11 | CTS | 106 | Clear to Send | |||
| 13 | RI | 125 | Ring Indicator | |||
Audio | 4 | MICROPHONE (+) |
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| 5 | MICROPHONE |
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| 10 | SPEAKER (+) |
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| 15 | SPEAKER |
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Boot | 3 | BOOT |
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| For factory use only. | ||
Reset | 14 | RESET |
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| To reset, connect to GND | ||
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| momentarily. Open for normal | |
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| operation. | |
12 |