Server User Manual
Table Of Contents
- SDS/SCS/STS/MDC User’s Guide
- Table of Contents
- Preface
- Introduction
- Hardware and Connectivity
- Configuration Methods
- Getting Started
- Using DeviceManager and WebManager
- Network Settings
- Configuring Serial Ports
- Introduction
- Serial Ports
- Serial Port Profiles
- Common Tabs
- Console Management Profile
- TruePort Profile
- TCP Sockets Profile
- UDP Sockets Profile
- Terminal Profile
- User Service Settings
- Printer Profile
- Serial Tunneling Profile
- Virtual Modem Profile
- Control Signal I/O Profile
- Modbus Gateway Profile
- Power Management Profile
- Remote Access (PPP) Profile
- Remote Access (SLIP) Profile
- Custom Application Profile
- Port Buffering
- Advanced
- Configuring Users
- Configuring Security
- Configuring I/O Interfaces
- Configuring Clustering
- Configuring the Option Card
- Configuring the System
- Controlling the RPS, I/O Channels, and IPsec Tunnels
- System Administration
- Introduction
- Managing Configuration Files
- Downloading IOLAN Firmware
- Calibrating I/O
- Setting the IOLAN’s Date and Time
- Rebooting the IOLAN
- Resetting the IOLAN to Factory Defaults
- Resetting the SecurID Node Secret
- Language Support
- Downloading Terminal Definitions
- Resetting Configuration Parameters
- Lost Admin Password
- Applications
- RADIUS and TACACS+
- SSL/TLS Ciphers
- Virtual Modem AT Commands
- Pinouts and Cabling Diagrams
- Setting Jumpers
- I/O Wiring Diagrams
- Utilities
- Accessories
- Troubleshooting
- Introduction
- Hardware Troubleshooting
- Communication Issues
- DeviceManager Problems
- Host Problems
- RADIUS Authentication Problems
- Login Problems
- Problems with Terminals
- Unknown IP Address
- DHCP/BOOTP Problems
- Callback Problems
- Language Problems
- Modem Problems
- PPP Problems
- Printing Problems
- Long Reboot Cycle
- SSL/TLS
- I/O Models
- IPv6 Issues
- Contacting Technical Support
- Glossary
- Index
Modem Problems
414 IOLAN SDS/SCS/STS/MDC User’s Guide, Version 4.0
Modem Problems
The IOLAN is not initializing the modem.
z Check your Line Service is set to SLIP or PPP. If your line service is set to any other type, the
IOLAN will not initialize a modem. You will need to configure the modem manually.
PPP Problems
The link fails on start-up when there are remote IP addresses set for both a user (Framed IP
value) and a line (
Remote IP address).
z Check the IP address set for the user; this is used in preference to the IP address set for a line. If
there is a problem with the user’s IP address, negotiation will fail; the IOLAN will not use the
line’s IP address as an alternative.
The link fails on start-up and security (either PAP or CHAP) is enabled on the line.
z Check the remote client/device has the same setting; that is, PAP if the IOLAN is using PAP.
The IOLAN does not perform negotiation with the remote end over PAP or CHAP.
At the remote end, the client software locks up when security (CHAP) is enabled on the line.
z Disable CHAP re-challenge parameter (challenge_interval) in the IOLAN. Some PPP client
software does not work when receiving CHAP re-challenges.
PPP is not running successfully over your 485 half-duplex environment.
z PPP is incompatible with half-duplex; it must be run over a full-duplex environment.
Printing Problems
The print job fails to print on the device attached to the serial port.
z On the line where the printer is attached, set Line Service to Printer. Print jobs will not print
when the line service is set incorrectly.
When using RCP, the network host receives a rejection message from the IOLAN. The result is
that the print job does not take place.
z Print using LPD
or
z Modify the printer interface scripts on the network host to overcome this weakness of RCP. The
modification will force the network host to continue trying to send the print job when the
IOLAN’s printer port is busy.
Long Reboot Cycle
Rebooting the IOLAN takes a long time.
If you are not using DHCP/BOOTP, disable this within the Server Services; otherwise, the IOLAN
waits to timeout for a request to DHCP/BOOTP.