ART(4)

NAME
art, musycc - Accoom Networks Artery T1/E1 network device

SYNOPSIS
musycc* at pci?
art* at musycc?

DESCRIPTION
The art device driver supports the Accoom Networks Artery Series Network cards. This includes the following models:

Accoom Artery Single T1/E1 PCI
Accoom Artery Dual T1/E1 PCI

The following media types (as given to ifconfig(8)) are supported:

media T1
    Set T1, B8ZS ESF operation.
media T1-AMI
    Set T1, AMI SF operation.
media E1
    Set E1, HDB3, G.703 clearchannel operation.
media E1-G.704
    Set E1, HDB3, G.704 structured operation without CRC4 checksum.
media E1-G.704-CRC4
    Set E1, HDB3, G.704 structured operation with CRC4 checksum.

If no media type is set, the art driver places the card into E1-G.704-CRC4 mode.

The art driver supports the following media options for all available media types:

mediaopt ppp
    Use PPP line protocol.

If no media options are set, the card defaults to cHDLC (Cisco High-Level Data Link Control) with 32-bit HDLC CRC checksum.

It is possible to change the timeslot range for the following media types:

T1
T1-AMI
E1-G.704
E1-G.704-CRC4

If no timeslots are configured, the art driver configures the card to use all possible channels. Use ifconfig(8) to change the timeslot range. For example:

Enable all possible channels for this card:
    # ifconfig art0 timeslot all

Enable channels 1-31 for this card:
    # ifconfig art0 timeslot 1-31

Enable channels 1-15, 16-31 for this card:
    # ifconfig art0 timeslot 1-15,16-31

It is possible to change the clock mode of the interface with ifconfig(8). To use the internal clock as clock source for the line, use master mode. For example:

    # ifconfig art0 media E1-G.704 mode master

The default mode recovers the clock from the incoming line signal. This can be explicitly set by using the autoselect mode. For example:

    # ifconfig art0 media E1-G.704 mode autoselect

DIAGNOSTICS

art0: device timeout The device has stopped responding to the network

art0: internal FIFO underflow The internal FIFO got empty while transmitting a packet. This may indicate a PCI bus congestion.

art0: internal FIFO overflow The internal FIFO overflowed while receiving a packet. This may indicate a PCI bus congestion.

art0: Failed to malloc memory There are not enough mbufs available for allocation.

SEE ALSO
ifmedia(4), pci(4), sppp(4), hostname.if(5), ifconfig(8)

HISTORY
The art device driver first appeared in OpenBSD 3.8.

AUTHORS
The art device driver was written by Claudio Jeker and Andre Oppermann. This manual page was written by Claudio Jeker.