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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:
# hsip_init hihp4 txd=-txd rxd=-rxd
To invert both clock and data signals, enter:
# hsip_init hihp4 txd=-txd rxd=-rxd txc=-txc rxc=-rxc
Appendix C
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.
18
Sun PCI High Speed Quad Port Serial Interface Adapter User's Guide • May 2010
discusses the background and requirements for these inverted settings.
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