Zhone Technologies 900 - Manual (Page 30)

1-18 IMACS System Release 5.1.6 Data Cards
Model No. Running Head HSU Card User Screens and Settings HSU Card
the data contains long strings of zeros. Inverting the zeros reduces the likelihood that the
composite T1 stream will not meet minimum-ones density requirements. Both systems of the
end-to-end HSD circuit path require the same DATA PLRTY option setting.
On the HSU-T V11 and HSU-T 35 Cards, the Data Polarity option is available only if the port
Mode is set to dce. The default setting in that mode is norm. For a dte port, the only available
setting is n/a.
CTS
The Clear To Send (CTS) setting controls when data is sent. Some DTE equipment must
receive a CTS signal before transmitting data. Set the CTS option to perm (permanent) to
make CTS permanently High (asserted). Choose rlocal (remote-local) to allow RTS to control
both CTS on the local DTE device and RLSD on the remote DTE device.
Choose to ignor (ignore) to always force CTS Low (negated). Set the CTS option to locl
(local) to make CTS follow RTS from the local DTE.
On the HSU-T V11 and HSU-T 35 Cards, the CTS settings are used only if the port Mode is
set to dce. The default setting in that mode is perm. For a dte port, the only available setting
is n/a.
CTS DELAY
The Clear To Send (CTS) Delay setting delays changes in the CTS signal in the local mode.
Enter the value you need in milliseconds. The available options are 0, 30, 60, and 100 ms. If
you do not know what value you need, start with 0 (zero) ms and increase the value gradually
until you no longer experience problems. The CTS option above must be set to locl before the
CTS DELAY setting has any effect.
On the HSU-T V11 and HSU-T 35 Cards, the CTS Delay settings are used only if the port
Mode is set to dce. The default setting in that mode is 0 (zero). For a dte port, the only
available setting is n/a.
LOCAL LB
The Local Loopback (LOCAL LB) option activates a loopback on the selected card port.
Choose the dte setting to loop the outgoing data from the external DTE device back to the
DTE receiver. This loopback (see Figure 1-10) allows you to check the local cabling and most
of the circuitry in the HSU Card. It also disconnects the incoming data from the far end.