3Com 3C840 manual DIP Switch Modes

1-12CHAPTER 1: OVERVIEW

configurations. See the table below for information about which switches to set for which configurations.

Table 1–2 DIP Switch Modes

	DIP Switch
1	2	3	4	Mode
off	off	off	on	Default Bridge Mode, Frame Relay, DLCI = 528, data
				encapsulated over RFC 1483.
off	off	on	off	Default Bridge Mode, Frame Relay, DLCI = 16, data
				encapsulated over RFC 1490.
off	on	off	off	DHCP Smart Mode
on	off	off	on	Default Bridge Mode, ATM, One VC define as a bridge,
				VPI/VCI = 0/38
off	off	off	off	Unconfigured Mode

All other configurations: Unconfigured Mode

■DHCP Smart Mode — (switch 2 on; all other switches off) This setting simplifies the configuration process by setting up the OfficeConnect Remote 840 as a DHCP and DNS server with a fixed IP address. For more information, see Chapter 2 of the Installation Guide.

■Default Bridge Mode — There are several different settings for Default Bridge Mode. The different settings control the WAN operational mode; ATM or Frame Relay, and the VPI/VCI or DLCI settings (see the table above). If you set the OfficeConnect Remote 840 to this mode and no configuration exists, the OfficeConnect Remote 840 will automatically set up a bridge network on the Ethernet and will create a VC profile that bridges using RFC 1483 or RFC 1490 encapsulation with various VPI/VCI or DLCI values (see the table above for details).