Manual Pages  — SBNI

sbni – Granch SBNI12 leased line modem driver

SYNOPSIS DESCRIPTION FILES SEE ALSO HISTORY AUTHORS

device sbni

The sbni driver provides support for leased line modems of following models:

• SBNI12-02, SBNI12D-02
• SBNI12-04, SBNI12D-04
• SBNI12-05, SBNI12D-05, ISA and PCI
• SBNI12-10, SBNI12D-10, ISA and PCI

and a kit for data link over a voice band:

• SBNI12-11, SBNI12D-11, ISA and PCI.

In addition to the standard port and IRQ specifications, the sbni driver also supports a number of flags which can set baud rate, receive level, and low three bytes of Ethernet MAC-address (high three are always 00:ff:01), because Granch modems are presented to the system as Ethernet-like network cards.

The high byte of the flags is a bit field, it is used to specify SBNI adapter receive level/baud rate:

Bits 0-3:
	receive level (0x00..0x0f)
Bits 4-5:
	baud rate number:

00 -	0 baud rate (2Mb in fast mode/500kb in slow)
01 -	1 baud rate (1Mb/250kb)
10 -	2 baud rate (500kb/125kb)
11 -	3 baud rate (250kb/62.5kb)

Bit 6:	use fixed receive level if bit 6 is set then receive level will be set according to bits 0-3 value, otherwise receive level will be autodetected
Bit 7:	use fixed baud rate if bit 7 is set then baud rate will be set according to bits 4-5 value, otherwise baud rate is set to 2Mb

The sources for the driver reside in:

/sys/dev/sbni/if_sbni.c /sys/dev/sbni/if_sbnireg.h /sys/dev/sbni/if_sbnivar.h

The sbni device driver first appeared in FreeBSD 4.6 .