Unit installation

Installation and Operation Manual Appendix D Command Language FCD-E1 Front Panel Parameters D-3
Table D-2. Link Configuration Parameters
Designation Function Values Configuration Guidelines FRAME
Selects the multiframing mode for the main link and the sublink
G732N – 2 frames per multiframe. Timeslot 16 can be used for user data. G732S – 16 frames per multiframe. UNFRM – Unframed G.703 signal, carrying the data applied to channel 1 Default: G732N
Select the framing mode specified for use in your network on the corresponding link. If some of the timeslots of a link are configured as voice type slots, that link must use the G732S mode, otherwise you will see CONFIG ERROR 006. For transmission of unframed data, select UNFRAME for the main link. In this case, all the ports except channel 1 are disabled (the data rate of channel 1 is automatically set to 2048 kbps).
SYNC
Used to change the frame alignment algorithms, to reduce the time required for the link to return to normal operation after loss of sync
CCITT – Complies with ITU-T Rec. G.732 FAST – After 1 second 62411 – Complies with AT&T TR-62411 (after 10 sec) Default: CCITT
Select CCITT, unless your application has special requirements.
FUNCTION
Displays the type of main link interface
DSU – FCD-E1 does not include an LTU LTU – FCD-E1 includes an LTU
IDLE CODE
Selects the code transmitted to fill idle (unused) timeslots in the main link frame
The following bit sequences are available (presented as hexadecimal numbers): 7F, 98, FF. You can also select any other sequence. Default: 3F
Select one of the three commonly used values, 7F, 98 or FF, or any value specified for use on the corresponding link in your network. Select the same value at the other end. FCD-E1 allows you to select any two-digit hexadecimal value.
CRC-4
Enables the generation of check bits (in accordance with the CRC-4 polynomial specified by ITU-T Rec. G.704)
NO – CRC-4 option disabled YES – CRC-4 option enabled Default: NO
Select YES, except when FCD-E1 link is connected to transmission equipment that does not support this option.
RAI
Selects whether remote alarm indication is sent to the sublink if a local or remote alarm exists in the main link.
DISABLE – RAI transfer disabled ENABLE – RAI transfer enabled Default: DISABLE