Zhone Technologies 900 - Manual (Page 18)

1-6 IMACS System Release 5.1.6 Data Cards
Model No. Running Head HSU Cards HSU Card
1.2.6 Four-Port HSU 530/35 Card Description (821570)
The four-port HSU 530/35 Card supports four RS530 or V.35 data ports. The selection of
RS-530 or V.35 is made on a port-by-port basis using on-board switches.
CAUTION!
If used in a system using a T1 “Line Code” other than “B8ZS,” HSU card
ports assigned to multirate circuits greater than or equal to 4 or more
consecutive time slots at 64kbps must have DTE connected to the port prior to
activation. Failure to attach DTE will cause a false carrier alarm.
1.2.6.1 Four-Port HSU Card Jumper/Switch Settings
The four-port HSU 530/35 Card has four slide switches that must be set for the proper type of
interface (either RS-530 or V.35) on ports 1 through 4 of the card. Figure 1-4 shows these
switches, which are factory-set for RS-530 operation on both ports. To change a port for V.35
operation, reset its associated switch as shown. Ports can be set individually for either RS530
or V.35 operation, but once set, they remain in that mode until the slide switches are reset.
Note: When setting switch to V.35 mode it unbalances the CTS Lead. It does not change the
voltage levels of the driver output. (The Personality Module will do the same thing as
setting the switch).