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18 Appendix
CONNect ACKnowledge Message
CONN ACK
Call Reference
CR
Call Transfer
CT
Closed User Group
CUG
Call Waiting
CW
Call waiting
Destination Address (1TR6)
DAD
Direct Dialling In
DDI
Direct dialling in to an extension on a PBX
DISConnect Message
DISC
Supplementary services (Dienstmerkmal)
DM
Dual Tone Multi Frequency
DTMF
Terminal Ident. No.
EAZ
(Endgeräteauswahlziffer - 1TR6)
Explicit Call Transfer
ECT
Call transfer or directed call forwarding
European Digital Subscriber Signalling
E-DSS1
System Number 1
Closed user group (CUG) (Geschlossene
GBG
Benutzer Gruppe)
High Layer Compatibility
HLC
Call Hold
HOLD
Hold
Integrated Services Digital Network
ISDN
INFOrmation Message
INFO
Link Access Procedure for D-channels
LAPD
channels
Logical channel number
LCN
Channel number in X.25
Low Layer Compatibility
LLC
Malicious Call Identification
MCID
Multiple Subscriber Number
MSN
Network Specific Facilities
NSF
Network Termination
NT
Origination Address (1TR6)
OAD
Protocol Discriminator
PD
RELease Message
REL
RELease ACKnowledge Message
REL ACK
RELease COMPLete Message
REL COMPL
Sending Complete Indication
SCI
Service Indicator (1TR6)
SIN
Sub-addressing / Sub-addressing is
SUB
possible
138
ARGUS 3u plus/3u NT
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