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CP(4) Device Drivers Manual (i386) CP(4)


cpdriver for synchronous Cronyx Tau-PCI WAN adapters


To compile this driver into the kernel, place the following line in your kernel configuration file:

device cp

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):


Additional options:
device sppp
options NETGRAPH


The cp driver needs either sppp(4) or netgraph(4). Which one to use is determined by the NETGRAPH_CRONYX option. If this option is present in your kernel configuration file, the cp driver will be compiled with netgraph(4) support. Otherwise, it will be compiled with sppp(4) support.

Refer to sconfig(8) for information about the cp adapter configuration.


The cp driver supports the following models of Tau-PCI WAN adapters:

Cronyx Tau-PCI
V.35 and RS-232 interfaces
Cronyx Tau-PCI/R
RS-530(RS-449) and X.21 interfaces
Cronyx Tau-PCI-L
one V.35 and RS-232 interface, low profile
Cronyx Tau-PCI-L/R
one RS-530(RS-449) and X.21 interface, low profile
Cronyx Tau-PCI-E1
fractional E1 interfaces
Cronyx Tau-PCI-G703
unframed E1 interfaces
Cronyx Tau-PCI-2E1
fractional E1 and unframed E1 interfaces
Cronyx Tau-PCI-4E1
fractional E1 and unframed E1 interfaces
Cronyx Tau-PCI-E3
E3 interface
Cronyx Tau-PCI-T3
T3 interface
Cronyx Tau-PCI-STS1
STS-1 interface


ctau(4), cx(4), sppp(4), ifconfig(8), sconfig(8), spppcontrol(8)


The cp driver was added in FreeBSD 5.3 and FreeBSD 4.11. The cp driver for previous versions of FreeBSD is available from

July 16, 2005 Debian