ART(4)                    OpenBSD Programmer's Manual                   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 me-
     dia 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
     art%d: device timeout  The device has stopped responding to the network

     art%d: internal FIFO underflow  The internal FIFO got empty while trans-
     mitting a packet.  This may indicate a PCI bus congestion.

     art%d: internal FIFO overflow  The internal FIFO overflowed while receiv-
     ing a packet.  This may indicate a PCI bus congestion.

     art%d: 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.

OpenBSD 4.7                    November 16, 2009                             2
