Support FAQ 268 |Dial-in modem out-of-band access

Dial-in modem out-of-band access

All console server models support an external or internal modem connection. If there’s difficulty in accessing the console server through the main network path, the console server provides an out-of-band (OoB) access path. So the Administrator can still access it and its Managed Devices from a remote location using a modem.

Some console server models, with USB ports, support attaching an external USB modem. Some models also come standard with an internal modem. All models support serially attaching an external dial-up modem and configuring dial-in OoB access. When configured this will show as the Serial Port tab on the System -> Dial menu.

Many models have a dedicated DB9 Local Console/Modem port. The external dial-up modem can be attached to this port. Others require Port 1 to be configured in Local Console/Modem mode and the external dial-up modem then is attached to this port
The IM42xx, IMG4216-34 and ACM5003M come with an internal modem which can provide OoB dial-in access. These models will display a Internal Modem Port tab under System -> Dial. Like all console servers they can also have an external modem serially attached to their RJ/DB9 modem port or USB 2.0 port
The ACM500x and IM4004-5 supports external USB modems (US Robotics 56K USB Modem PN: USR5637 recommended). These modems will be auto-detected and an External USB Modem Port tab will come up under System -> Dial (in addition to the Serial DB9 Port tab)

Note: Firmware V3.5.2 and beyond support multiple dial-in users, who are setup with dialin Group membership. The User name and Password to be used for the dial-in PPP link, and any dial-back phone numbers are configured when the User is set up. Earlier firmware only supported one PPP dial-in account which had to be an Administrator level user.

To activate the Administrator must enable OoB dial-in access on the console server. Once set-up for dial-in PPP access, the console server will await an incoming dial-in connection from a remote site:

Select System: Dial and select the port to be configured
Set the Baud Rate and Flow Control that will be used on the modem link. In all cases it is recommended that this be changed to 38,400 baud with Hardware Flow Control. However for the Serial DB9 Port set these settings obviously must match that of the attached modem
Check Enable Dial-In Access and configure the Dial-In Settings (Username, Password, Remote and Local PPP IP Address field, Authentication)
Click Apply

Then set up the remote client dial-up software so it can establish a network connection from the Administrator's client modem to the dial-in modem on the console server.

If you are using the SDTConnector client it can be set up to OoB connect to the remote console server at the click of a button (refer faq276).

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