User`s guide

13(14)
Datum/Date Rev
Dokumentnr/DocumentnrUppgjord/Prepared
Dokansv/Godkänd - Doc respons/Approved Kontr/Checked Tillhör/Referens-File/Reference
99-07-15 F
361/155 34-ASB 150 02 Uen
FACILITY DESCRIPTION
Faktaansvarig - Subject responsible
Adjust Filter coefficient for BTU-E:
1609
Filter coefficient
This command is used to state the filter coefficient in
the analogue interface on the line board.
The impedance is stated as:
Rs (ohm) + Rp (ohm) // Cp (nF).
Valid data: 98 - 255
Equipment
Two different printed boards provide the physical
connection with different types of signalling:
BTU-E and BTU-C.
The function requires one or more BTU-E or BTU-C
boards.
BTU-E - E&M Tie Lines
The BTU-E provides four E&M tie lines capable of
handling various signalling schemes:
• Swedish E&M
• Continous E&M signalling, A-format or D-format,
2-wire or 4-wire speech connection
• Discontinuous E&M signalling, 2-wire or 4-wire
speech connection
• E&M with blocking on separate E and M wires
(for 2-wire and 4-wire speech connection)
• American E&M
• Tone signalling according to CEPT L1 or
SSAC 15 A
(4-wires used for speech and signalling)
• Application for paging equipment according to
ESPA standards (2-wire speech including signal-
ling for "paging in progress“ and "paging equip-
ment not present“)
Different types of BTU-Es
BTU-E :
1 2- or 4-wire speech-connection has to be
adjusted via jumpers on the board.
2 Set the Line signal schemes via
command 1201.
The following Line signals chemes are
noT supported:
44 CEPTL 1
45 CAILHO - discontinous
46 SSAC 15 - A
BTU-E / 1:
1 Set the line signal-scheme via
command 1201.
The following line signal-schemes are not
supported:
44 CEPTL 1
46 SSAC 15 - A
2 2- or 4-wire speech-connection has to be
adjusted via command 1609.
Only the following setting supports
4-wire speech connection: “ 116 ”
All the others support 2-wire speech
connection.
HINT: If you program command 1609 for
4-wire speech connection, you
HAVE TO set the line signal-
scheme once again !