Chapter 3. LCD Operation
28
May 2011
Press ENTER and the E1 LINE sub-menu will be displayed. E1 Line sets the frame type, CRC
mode, cascade mode, idle code, RAI state and Line Code for the E1 link of the ETU-01A.
< E 1 L I N E >
FR A M E :CCS
Use the arrow keys to browse the individual link parameters (frame, CRC, etc.). Press ENTER
on the parameter to select it with the cursors. Now use the arrow keys to browse the available
settings for that parameter. The following is a breakdown of each parameter and available settings:
FRAME; CCS(PCM31), CAS(PCM30), or UNFRAME, CCS default.
Note: When UNFRAME is selected, the Data Port rate is automatically set to 2.048 Mbps.
CRC-4; OFF or ON, OFF default. (no use when unframed)
CASCADE, OFF or ON. OFF default.
IDLE CODE; any hex code from 00 to FF, 7E default.
RAI; (Remote Alarm Indicator) DISABLE or ENABLE, ENABLE default.
LINE CODE; HDB3 or AMI, HDB3 default.
IMPEDANCE; displays setting dependant upon the DIPSW1 settings.
3.4.4 Timeslot Mapping Detail
The following screen is an example of the screen under Timeslot Mapping.
TIME SLOT MAPPING
< T I M E S L O T >
M A P P I N G
Press ENTER.
F ** * * * **********
* ** * * * **********
The E1 frame is shown with 32 timeslots, top row left to right are TS0-15, while the bottom
row displays the settings for TS16-31. Press ENTER to assign the TS, use the arrow keys to move
to the next or previous TS. Designations shown are described as follows:
F = Framing (CCS/CAS) always on TS 00
S = Signaling (CAS) always on TS 16 if in CAS frame mode
. = not assigned
* = Data Channel uses this TS
Note:
TS 00: Cannot be assigned in CCS or CAS mode of E1 LINE to anything but Framing.
If TS 16 is assigned, the frame mode will not be able to be changed to CAS framing until the TS is
freed (not assigned).
TS 16: Will automatically be assigned to Signaling in CAS mode of E1 LINE and can only be used
for Signaling. Signaling is usually required when E1 is being used to transmit voice channels.
To Next Page
Loading...
Need help?
General