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18 Sun PCI High Speed Quad Port Serial Interface Adapter User’s Guide • December 2005
T1 Compatibility Options
The version of the hsip_init utility shipped with the SunHSI software has options
that enable you to invert data and clock signals to accommodate the requirements of
T1 or CEPT transmission equipment. The hsip_init parameters that allow for
inversion are:
■ txd – transmit data signal
■ rxd – receive data signal
■ txc – transmit clock signal
■ rxc – receive clock signal
The effect of the default settings for all of these parameters is that SunHSI software
does not invert the data or clock signal controlled by the parameter. To invert a
signal, you specify a setting of the form param-name=-paramname, for example,
txc=-txc.
As an example, suppose you want to invert the transmit and receive data signals on
the first SunHSI/U port (port 0) on the second SunHSI/U adapter in your system.
To do so, enter the following command:
To invert both clock and data signals, enter:
Appendix C discusses the background and requirements for these inverted settings.
Operating Modes Options
This section describes the operating modes that you can set with the hsip_init
utility.
The SunHSI software operates in two main operating modes, the high-level data link
control (HDLC) mode and the IBM (SDLC) mode. The HDLC mode always operates
in a full-duplex, point-to-point fashion. While the IBM mode defaults to a
full-duplex, point-to-point, operation, you can also set this mode to be either a
half-duplex or a multipoint operation.
# hsip_init hihp4 txd=-txd rxd=-rxd
# hsip_init hihp4 txd=-txd rxd=-rxd txc=-txc rxc=-rxc