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CHAPTER 6 NDA-24305
Page 200
Revision 1.0
Q-SIG/ISDN INTERNATIONAL GATEWAY SWITCHING
Q-5 Q-SIG/ISDN INTERNATIONAL GATEWAY SWITCHING
1. General Description
This feature allows converting a User Information Layer 1 Protocol (µ-law/A-law) of call originated to ISDN
line according to the office data. See the figure below for examples.
[Case 1: Conversion in tandem office]
(a)Incoming Call from ISDN line (SETUP message is received)
When µ-law is selected as output Layer 1 protocol to outgoing trunk.
When non-conversion is selected to outgoing trunk (the Layer 1 protocol is output as received).
Incoming Call from ACIS/CCIS line (SETUP message is not received)
When A-law is selected as output Layer 1 protocol to outgoing trunk.
NEAX2400 IPX (A-law)
PBX
(µ-law)
PBX
(A-law)
A-law (SETUP)
µ-law
ISDN Line
ISDN Line
µ-law (SETUP)
ARTI data:
µ-law (UALAW = 1)
NEAX2400 IPX ( A-law)
PBX
PBX
ISDN LineISDN Line
ARTI data:
non-conversion
(UALAW = 0)
A-law (SETUP)
A-law (SETUP)
NEAX2400 IPX (µ-law)
PBX
(A-law)
PBX
(µ-law)
ISDN Line
ACIS/CCIS Line
A-law (SETUP)
A-law
ARTI data:
A-law (UALAW = 2)