17.77. TNDV - Tone in end-of-dialing signals activates partner
device of trunk 
Feature:
Tone switching in end-of-dialing signals
Announcement equipment for synchronous announcements
Function:
If the parameter TNDV is set in the COT of a trunk, the tone sent by the line is not
switched through to the partner device, but rather the partner device creates the
relevant
tone on the basis of the end-of-dialing message sent by the trunk.
Requirement: In the case of the analog trunk or seized outgoing digital S0/S2 trunk,
the TNDV parameter must be set, while the TR6T parameter may not be set.
IMPORTANT:
The TNDV parameter generally releases the network-wide applications of
announcement equipment for synchronous announcements.
AMO Interrelationships:
COT Classes of Trunks:
TR6T .... Tones are supplied as in 1TR6 CO
ZAND:
COANN .... Switch or release an announcement from the public network to the subscriber
during outgoing seizure
Device types:
Analog and digital CO trunk circuits, interface circuits and tie trunk circuits
For example, SOCOD, S2COD, SOCONN, S2CONN, etc.
Protocol variants:
CORNV33 - CorNet protocol
CORNV33R - CorNet protocol
ECMA1 - ECMA QSIG V1 protocol
ECMA1R - ECMA QSIG V1 protocol
ECMAV2 - CorNet-NQ Issue 2.1 Dec. 96 Basic ETSI
ECMAV2R - QSIG ETSI ETS 300 172 3rd. with SS 2nd.
PSS1V2 - CorNet-NQ Issue 2.1 Dec. 96 Basic ISO/IEC
PSS1V2R - QSIG ISO ISO/IEC 11572 2nd. with SS
EDSGER - EDSS1 protocol for Germany