if_sbni (4)

Leading comments

Written by Denis I. Timofeev, 2002.

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(The comments found at the beginning of the groff file "man4/if_sbni.4freebsd".)

NAME

sbni - Granch SBNI12 leased line modem driver

SYNOPSIS

device sbni

DESCRIPTION

The ifconfig 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 ifconfig 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

FILES

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

SEE ALSO

arp(4), netintro(4), ifconfig(8)

HISTORY

The ifconfig device driver first appeared in Fx 4.6 .

AUTHORS

An -nosplit The ifconfig device driver for Fx 4.x was written by An Denis I. Timofeev , partially based on An David Greenman Ns 's ed(4) driver. Earlier versions (available on ftp: ftp.granch.com were written by An Alexey V. Zverev .

SBNI12 hardware was designed by An Alexey V. Chirkov .