Emutel Duo supports the following supplementary services:
Euro-ISDN
Caller Line Identification, Multi Sub Numbering, Subaddressing, User to User Signalling, Terminal portability, Connected Party Number, Advice of Charge/Billing, Call Waiting, Call Hold, Explicit Call Transfer, Call Diversion, Malicious Call Identification, Three Party Calling.
Nat-1
Caller Line Identification, Subaddressing, User to User Signalling, Flexible Calling, EKTS Call Appearance Call Handling, Hold Conference Drop Transfer.
AT&T 5ESS
Caller Line Identification, User to User Signalling, EKTS Call Appearance Call Handling, Hold Conference Drop Transfer.
DMS 100
Caller Line Identification, Subaddressing, User to User Signalling.
NTT
Caller Line Identification, Multi Sub Numbering, Subaddressing, User to User Signalling, Advice of Charge/Billing.
1TR6
Caller Line Identification, Multi Sub Numbering, Subaddressing, User to User Signalling.
VN3
Caller Line Identification, Multi Sub Numbering, Subaddressing, User to User Signalling, Terminal portability.
BTNR191
Caller Line Identification, Multi Sub Numbering, Subaddressing, User to User Signalling, Terminal portability.