PC Card Modem Settings

To enter modem settings for a PC Card:

  1. Insert any of the supported modem or ISDN cards (see www.lantronix.com/slc) into either of the PC Card bays on the front of the SLC. (You can do this before or after powering up the SLC.)

  2. From the main menu, select PC Card. The PC Card page displays.

  3. Select the PC Card you want to configure from the PC Card Slots table and click the Configure button. The PC Card – Modem/ISDN page displays

  4. Complete or view the following sections:

Data Settings

ISDN Settings

Modem Settings

Text Mode

PPP Mode

GSM/GPRS Settings

IP Settings

Data Settings

Baud

The speed with which the device port exchanges data with the attached serial device.

From the drop-down list, select the baud rate. Most devices use 9600 for the administration port, so this is the default.

Check the equipment settings and documentation for the proper baud rate.

Parity

Parity checking is a rudimentary method of detecting simple, single-bit errors. From the drop-down list, select the parity. The default is none.

Flow Control

 A method of preventing buffer overflow and loss of data. The available methods include none, xon/xoff (software), and RTS/CTS (hardware). The default is none.

Data Bits

Number of data bits used to transmit a character. From the drop-down list, select the number of data bits. The default is 8 data bits.

Stop Bits

The number of stop bit(s) used to indicate that a byte of data has been transmitted. From the drop-down list, select the number of stop bits. The default is 1.

ISDN Settings

 Note: These fields are disabled if the PC Card inserted is not an ISDN card.

Channel

Select to indicate which B channel on the ISDN card to use. Valid values are 1 and 2. (The B-channel is the channel that carries the main data.) Only one 64K channel can be used at a time.

Phone Number

 Phone number associated with the B channel. May have up to 20 characters. Any format is acceptable.

Modem Settings

State

Indicates whether an external modem is attached to the device port. If enabling, set the modem to dial-out, dial-in, dial-back, dial-on-demand, or dial in & dial-on-demand. Disabled by default.

Mode

The format in which the data flows back and forth.

With Text selected, the SLC assumes that the modem will be used for remotely logging into the command line. Text mode is only for dialing in. This is the default.

PPP establishes an IP-based link over the modem. PPP connections can be used in dial-out mode (e.g., the SLC connects to an external network) or dial-in mode (e.g., the external computer connects to the network that the SLC is part of). For ISDN cards, only PPP connections are allowed.

Initialization Script

Commands sent to configure the modem may have up to 100 characters. Consult your modem’s documentation for recommended initialization options. If you do not specify an initialization script, the SLC uses a uses a default initialization string of AT S7=45  SO=0  L1  V1  X4  &D2  &c1  E1  Q0.

Note: We recommend that the modem initialization script always be pre-pended with AT and include E1 V1 x4 Q0 so that the SLC may properly control the modem.

Modem Timeout

Timeout for modem connections. Select Yes (default) for the SLC to terminate the connection if no traffic is received during the configured idle time. Enter a value of from 1 to 9999 seconds.

Caller ID Logging

 

Select to enable the SLC to log caller IDs on incoming calls. Disabled by default.

Note: For the Caller ID AT command, refer to the modem user guide.

Modem Command

 

Modem AT command used to initiate caller ID logging by the modem.

Note: For the AT command, refer to the modem user guide.

Text Mode

Timeout Logins

If you selected text mode, you can enable logins to time out after the connection is inactive for a specified number of minutes. The default is No. This setting only applies to text mode connections. PPP mode connections stay connected until either side drops the connection. Disabled by default.

Dial-back Number

Users with dial-back access can dial into the SLC and enter their login and password. Once the SLC authenticates them, the modem hangs up and dials them back.

Select the phone number the modem dials back on: a fixed number or a number associated with their login. If you select Fixed Number, enter the number (in the format 2123456789).

Dial-in Host List

From the drop-down list, select the desired host list. The host list is a prioritized list of SSH,Telnet and TCP hosts that are available for establishing outgoing modem connections. The hosts in the list are cycled through until the modem successfully connects to one.

To establish and configure host lists, click the Host Lists link.

PPP Mode

Negotiate IP Address

If the SLC and/or the serial device have dynamic IP addresses (e.g., IP addresses assigned by a DHCP server), select Yes. This is the default.

If the SLC or the modem have fixed IP addresses, select No, and enter the Local IP (IP address of the port) and Remote IP (IP address of the modem).

Authentication

Enables PAP or CHAP authentication for modem logins. PAP is the default.

With PAP, users are authenticated by means of the Local Users and any of the remote authentication methods that are enabled.

With CHAP, the CHAP Handshake fields authenticate the user.

CHAP Handshake

The Host/User Name (for UNIX systems) or

Secret/User Password (for Windows systems) used for CHAP authentication. May have up to 128 characters.

Same authentication for Dial-in & Dial-on-Demand (DOD)

Select this option to let incoming connections (dial-in) use the same authentication settings as outgoing connections (dial-on-demand). If this option is not selected, then the dial-on-demand connections take their authentication settings from the DOD parameter settings. If DOD Authentication is PAP, then the DOD CHAP Handshake field is not used.

DOD Authentication

Enables PAP or CHAP authentication for dial-in & dial-on-demand. PAP is the default. With PAP, users are authenticated by means of the Local Users and any of the remote authentication methods that are enabled. With CHAP, the DOD CHAP Handshake fields authenticate the user.

DOD CHAP Handshake

For DOD Authentication, enter the host/username for UNIX systems) or secret/user password (for Windows systems) used for CHAP authentication. May have up to 128 characters.                   

Enable NAT

Select to enable Network Address Translation (NAT) for dial-in and dial-out PPP connections on a per modem (Device Port or PC Card) basis. Users dialing into the SLC access the network connected to Eth1 and/or Eth2.

Note: IP forwarding must be enabled on the Network - Settings page for NAT to work.

Dial-out Number

Phone number for dialing out to a remote system or serial device. May have up to 20 characters. Any format is acceptable.

Dial-out Login

User ID for dialing out to a remote system. May have up to 32 characters.

Password

Password for dialing out to a remote system. May have up to 20 characters.

GSM/GPRS Settings

These settings are only active when a GSM/GPRS PC card modem is in the appropriate slot.

Notes:

PIN and Retype PIN

PIN (personal identification number) for accessing the GSM/GPRS card.

PPP Compression

Select to enable negotiation of data compression over PPP links. Disabled by default.

Auto-Acquire DNS

Select to enable the SLC to acquire up to three DNS servers by means of GPRS (General Packet Radio Service). Enabled by default.

Dial-out mode

Select either GPRS or GSM (Global System for Mobile communication) as the type of dial-out connection.

GPRS Context

Command to specify the protocol data packet (PDP) context parameter values.

GSM Bearer Svc.

Command to select the bearer service, data rate, and connection element to use when data call originate.

Negotiated IP

IP address associated with the GPRS connection.

IP Settings

Service

The available connection services for this modem port (Telnet, SSH, or TCP). Only one can be active at a time. The default is None.

 

Telnet Port

Telnet Port Telnet session port number to use if you selected Telnet.

Defaults:

Upper PC Card Slot: 2049

Lower PC Card Slot: 2050

Range: 1025-65535

SSH Port

The SSH session port number  to use if you selected SSH.

Defaults:

Upper PC Card Slot: 3049

Lower PC Card Slot: 3050

Range: 1025-65535

TCP Port

The TCP (raw) session port number to use if you selected TCP.

Defaults:

Upper PC Card Slot: 4049

Lower PC Card Slot: 4050

Range: 1025-65535

Authenticate

 If selected, the SLC requires user authentication before granting access to the port. Authenticate is selected by default for Telnet Port and SSH Port, but not for

TCP Port.

  1.  To save settings for just this port, click Apply.

  2. To save selected settings to ports other than the one you are configuring:

a) From the Apply Settings drop-down box, select none, a group of settings, or All.

b) In to Device Ports, type the device port numbers, separated by commas; indicate a range of port numbers with a hyphen (e.g., 2, 5, 7-10).

Note: It may take a few minutes for the system to apply the settings to multiple ports.

 

See also

PC Card - Overview

PC Card Storage