3 Section Serial PPP Communication
3.1
Overview
Communication between a DAS and a PC can be accomplished by using either:
Direct PPP connection over a direct serial link with a serial cable or serial radio. Modem PPP connection over a serial link with the 130 DAS Modem or by using the Modem connector on the 130-SM. An optional external modem can also be used with the 130 NET connector for serial communication.
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3.2
3.2.1
Direct PPP Connection
PC Setup
Information File (Generic Null Modem.inf)
REF TEK has supplied a modem information file (Generic Null
Modem) that is located in the C:\reftek directory. This file must be resident on the local drive, however, there is no reason to access or make changes to it. This information file is not needed when using a standard telephone modem. If you do not need to install the Generic Null modem skip the next section. To add a generic null modem perform the following instructions: 1. From the Control Panel select the Phone and Modems icon. 2. Select the Modems tab. 3. Click Add.
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4. Select the "Don't detect my modem" option if installing a Generic Null Modem.
Figure 3 - 1 Install New Modem
5. Select the Next> to select the modem from a list. 6. In Install New Modem click Have Disk(Figure 3 - 2).
Figure 3 - 2 Have Disk in Install New Modem window
Figure 3 - 3 Install From Disk
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7. At the Install From Disk window in the Copy Manufacturer's files from: text box type C:\reftek 8. Click OK when ready (Figure 3 - 3). 9. At the Install New Modem window under Models select Generic NULL Modem. 10. Click Next> when ready (Figure 3 - 4).
Figure 3 - 4 Select Generic NULL Modem window
11. At the next Install New Modem window select an available port to use for the modem 12. Click Next> when ready (Figure 3 - 5).
Figure 3 - 5 Select Communication Port
Note: If the "Digital Signature Not Found" warning appears, select the Yes button and proceed.
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Direct PPP Connection
13. The Install New Modem window will display Your modem has been set up successfully 14. Click the Finish button (Figure 3 - 6).
Figure 3 - 6 Modem set up successful
15. At the Phone and Modems Options window select the Properties button.
Figure 3 - 7 Phone and Modem options
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16. In the Generic NULL Modem Properties window on the General tab click the Maximum Port Speed drop-down menu and select the maximum baud rate setting (Figure 3 8).
Note: The baud rate settings MUST match the configuration of the connected equipment.
[1] For direct connection to the 130, the baud rate the 130 is configured to. [2] For direct connection to a 72A with the RT422 board, the RT422 board is configured at the factory to 9600 but can be changed. Reference the RT422 Asynchronous Serial Communications Card (Board Document) for additional information on the jumper configurations that support the baud rate setting. [3] For connection to a DAS thru a radio or other equipment, consult their operations manual.
17. Click OK when ready.
Figure 3 - 8 Set modem properties
18. In the Phone and Modems Options window click the OK button. 19. At this point the PC needs to be restarted. Using standard operations restart the PC.
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Direct PPP Connection
Adding Remote Access Services (RAS)
Configure the Remote Access Services (RAS): 1. Using standard window operations click Start --> Settings --> Control Panel.
Network and Dial-up Connection
Figure 3 - 9 Control panel
2. Double-click the Network and Dial-up Connection Icon.
Figure 3 - 10 Network and Dial-up connection under Windows 2000
Note: Windows XP uses a "New Connection" wizard.
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3. Double-click the Make a New Connection Icon.
Figure 3 - 11 Make a New Connection
4. Select the Next option screen and select Accept incoming connections.
Figure 3 - 12 Accept Incoming Connections
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Direct PPP Connection
5. Select the Next button and check the Generic Null Modem option.
Figure 3 - 13 Device for Incoming Connection
6. Click the Next button when ready to continue. 7. Select the Allow option on the Incoming Virtual Connection window.
Figure 3 - 14 Select Allow Incoming Virtual Connection
8. Click the Next button.
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9. Select the Add button to add a new DAS connection.
Figure 3 - 15 Add DAS user Note: When a DAS unit is setup and is connected to a PC, an account must be created and added. The account Username MUST be the particular DAS unit ID that is directly connected to the PC.
10. At the New User window in the User name: text box type the correct user name das#_ _ _ _ and password das#_ _ _ _, Where: _ is the DAS unit ID number
- If the DAS unit ID is only 3 digits use a leading zero, include the alpha characters das and number sign (#). - If the DAS unit ID is hex, the letters should be in uppercase ONLY (i.e. 9AB2 not 9ab2). - 8 total characters only.
11. Click in the Full Name: and fill-in (any name or leave blank). 12. For the Password: setting you must use the Username (i.e., das#9066).
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Direct PPP Connection
13. Next Confirm Password by re-typing the password.
Note: The Password: settings are case sensitive.
14. Select the OK button to create the new user.
Figure 3 - 16 Added DAS user
15. Select the Next button. 16. In the Network Components window (Figure 3 - 17), under the components, highlight Internet Protocol (TCP/IP). 17. Select the Properties button.
Figure 3 - 17 Networking components
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18. On the Incoming TCP/IP Properties, enable Allow callers to access my local area network.
Figure 3 - 18 Incoming TCP/IP properties
19. 20. 21. 22. 23. 24.
Enable Specify TCP/IP address. In the From: text box type a generic IP address where: From IP address = PC's PPP IP address. In the To: text box type a destination IP address where: To IP address = Range of IP address for Serial PPP pool. Click OK when ready.
Figure 3 - 19 Remote Access Setup window
25.Click Finish after naming the connection.
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3.2.2
Start Remote Access Service (RAS) Windows provides a services control program. It must be used to start RAS. The control program can be accessed through the Windows Control Panel:
For Windows 2000: Start -> Settings -> Control Panel -> Administrative Tools > Services For Windows XP: Start -> Settings -> Control Panel -> Administrative Tools > Services -> Component Services. A shortcut to the control program has also been placed at Start -> Programs -> Refraction Technology -> RTP Services -> Services. The shortcut can be copied to the windows desktop by dragging it to the desktop while holding down the CTRL key.
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To start RAS perform the following steps: 1. Start the Services control program. 2. Double-click the Services icon to open the windows services process window.
Start icon
Figure 3 - 20 Services window
3. Highlight and select the Routing and Remote Access service. 4. Start the service by using the Action pull-down or using the start icon on the task bar.
Figure 3 - 21 RAS started
5. Close the control program.
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Modem PPP Connection
3.3
3.3.1
Modem PPP Connection
130-Modem The REF TEK 130-Modem which is shown below, is capable of providing the same functions as the internal SLM2456 modem module and can be used in all of the REF TEK 130 Series Data Acquisition System family. The unit looks similar to the 130-GPS (as shown in Figure 3 - 22) except it has the 130-Modem label on the end of the unit and two wires connected as shown below in Figure 3 - 23.
on 130-Modem
Note Label
Figure 3 - 22 130-GPS
Figure 3 - 23 130-Modem
3.3.2
DAS Setup This Section the explains REF TEK 130-Modem when it is used with the REF TEK 130 family. The 130-Modem is an optional external modem. A user should be familiar with whatever REF TEK host system is in current use. Documents for other REF TEK products are available on request.
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Modem PPP Connection
3.3.3
Setting up the 130 to use the 130-Modem 1. Connect the 130-Modem to the 130 DAS unit NET connector, using the standard REF TEK 130-8154 cable supplied with the 130-Modem unit, this cable is also available seperately (see drawing). 2. Attach the phone line connector to an available phone line connection. The REF TEK 130-8154 130-Modem-to-DAS cable referred to above is wired as follows:
Modem Connector PT06A1210P(SR) PIN A PIN B PIN C PIN D PIN E PIN F
PIN G PIN H
130 Net Connector (PT06A14-19S) PIN A PIN B PIN C PIN D PIN E PIN F
-
Signal RX TX RTS CTS GND CCD
Phone - TIP Phone - RING
Phone Line Cable
Red - 2 Green - 3
PIN J PIN K
PIN G PIN M
5V 12 V
No additional cables are needed to operate the 130-Modem and REF TEK 130. The user should consult applicable literature for other host devices.
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SLM Modem module
3.4
SLM Modem module The SLM2456 modem module is used in the 130-Modem and as the internal modem for the 130-01. The SLM2456 is a complete, modem module that is based on the Si2456 chipset. The Si2456 is an ITU-V.90 compliant, 56 kbps modem chipset with integrated direct access arrangement (also called DAA it includes parallel phone detect, over-current detection and global PTT compliance). This provides a programmable line interface to meet global telephone line requirements. It is a single design that includes a DSP data pump, a modem controller, on-chip RAM and ROM, an analog front end (AFE) a DAA, and analog output.
Note: The 130-8137 modem cable is used with the 130-01 when supplied with an internal modem.
3.4.1
Modem features The SLM2456 accepts standard modem AT commands and provides connect rates up to 56/33.6/14.4 kbps full-duplex over the Public Switched Telephone Network (PTN). It also features a complete set of modem protocols including all ITU-T standard formats up to 56 kbps.
Note: This material is part of the Silicon Laboratories Si2456/33/14 data sheet document revision 1.0. See the Si2456/33/14 Users Guide ("AN70:Si245/ Si2433/Si2414/Si2403 Modem Designer's Guide) for detailed feature explanations.
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Modem configuration
3.5
Modem configuration
Note: The internal modem (used on the 130-SM) requires the jumper installed on the RT530 lid board to assign the serial PPP port to the internal modem and therefore disable the serial PPP port coming out of the NEt connector.
3.5.1
PFC_130 Serial PPP
Use the Serial PPP settings within the PFC_130 to configure the modem.
Note: Serial PPP settings are for internal and external modem control. If a modem is connected the user MUST use these settings to configure the modem.
1. Use the Control menu Net button to assign Serial PPP parameters for the modem.
Figure 3 - 24 PFC_130 Control menu.
2. Click the Line Mode (type of serial connection) pull-down arrow and select the AT/Modem option from the pulldown.
Note: Direct - Connection to a PC or router or FW in point-to-point mode. Note: FW Multi - Connection to a Freewave operating in multipoint mode. Note: AT/Modem - Connection to a modem.
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3. Click the Baud Rate (serial port speed) pull-down arrow and select the 19200 baud rate.
3
3
Figure 3 - 25 Assign Serial PPP Line Mode and Baud Rate
Note: It is preferred to set the port speed at 19200 to allow for phone noise and the modem buffering to keep up.
4. After assigning Serial PPP parameters use the Send button to send them to the DAS.
Figure 3 - 26 Send Serial PPP parameters to the DAS
Data via ftp ONLY
Note: When the Send button is selected both Ethernet and Serial PPP IP configuration are sent to the DAS at the same time. So it is therefore possible to edit both sets of configurations at the same time and only send them to the DAS once. Figure 3 - 27 Send Serial PPP parameters
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Modem configuration
If using AT/Modem - Line Mode: 1. Select the Modem button to adjust the modem settings.
1
Figure 3 - 28 Modem setup screen
2. Tap after the Init. field and provide the modem initialization parameters as shown below (ATE0S0=1).
Figure 3 - 29 Modem Init string Note: Type the init string exactly as shown above. The init string is the ONLY string that works. It is sent to the modem on both boot up of the 130-01 and/or if sent from the above window using the Send button.
3. Tap the Send button to send the modem parameters to the DAS. 4. Tap the Done button to return to the Connection setup menu.
Send
Figure 3 - 30 Send the modem parameters
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Modem ...