I. SDLC/HDLC Protocol
154001UA
I-11
Terminal Access
The following procedure assumes the channel has already been assigned as
SDLC/HDLC
.
To select
CHANNEL TYPE
from the Main Menu:
TYPE:
1
PRESS:
RETURN
TYPE:
n (n = channel number)
PRESS:
RETURN
The
SDLC/HDLC
Parameters Menu Displays.
TYPE:
1
from the
CHANNEL PARAMETERS
Menu
PRESS:
RETURN
The terminal displays:
2 0 3 1 I-1 4
(ENTER 1-3 <CR> TO CHANGE. <CR> TO RETAIN OLD SETTING.):
CHANNEL n TYPE: CURRENTLY: SDLC/HDLC
1:
2:
ASYNC
HPENQ
3:
SDLC/HDLC
Clock Source
Clock Source
Clock Source
Clock Source
Clock Source
This parameter determines how the data will be clocked in and out of the 3028
Turbo (CTS 2031 Turbo) multiplexer. If you select the internal (
INTERN
) clock the
3028 Turbo (CTS 2031 Turbo) multiplexer furnishes both transmit and receive
clocks on Pins 15 and 17. If you select external (
EXTERN
) clock, the 3028 Turbo
(CTS 2031 Turbo) multiplexer will accept external transmit clock on Pin 24 and
receive clock on Pin 18. If internal/external (
INT/EXT
) clock is selected, the 3028
Turbo (CTS 2031 Turbo) multiplexer will furnish receive clock on Pin 17 and will
accept external transmit clock on Pin 24.
When external clock is selected, the channel speed is not used (unless the channel
is programmed for
NRZI
data encoding. This will be explained in the Data
Encoding section). A specific speed MUST be selected with the other two clock
source options.
Front Panel Access
From the
COMMAND MODE
display:
PRESS:
NEXT or LAST
until
CHNL PARAMETERS
displays on the second line
PRESS:
SELECT
PRESS:
NEXT or LAST