10.56.1. Feature Description 
The following deals with implementing OpenScape 4000 in the analog
telephone networks of traffic enterprises: Bundes-Autobahnen (AB, German
federal motorways), Deutsche Bundesbahn (DB, German Federal Railways),
Deutsche Reichsbahn (DR, German Reichsbahn) und Wasserstraßen- und
Schiffahrts-Direktion (WSD, Waterways and Shipping Authority), Energie
Versorgungs Unternehmen (EVU, Power and Utilities) and for the following
countries: CIS, Poland and Italy. Here the subscriber can continue to
dial in to the analog network (suffix-dialing) even after the OpenScape
4000 has received an "answer" signal. Suffix-dialing is possible from
analog (dial pulsing) and digital terminals and from ACs.
A maximum of 22 digits can be transmitted.
The parameter DPSTN must be maintained in the COS of all trunks in
all OpenScape 4000s. The parameter must always be set for S0/S2 circuits.
Access to the analog telephone network is achieved via digital tie
trunks with CAS (TFZ or EB5/NAL signaling), or indirectly via one or
more transit nodes. These transit nodes must be networked via digital
tie trunks with S2 (CorNet-N protocol). The analog trunks are connected
to the digital CAS interface via primary multiplexers (PMUX) in the case
of TFZ signaling and via signal converters in the case of EB5/NAL signaling.
Incoming trunk calls via EB5 systems can be returned to the EB5 attendant
console by the called OpenScape 4000 subscriber by dialing the flashing
code. EB5 subscribers can intrude on OpenScape 4000 subscriber calls
if the subscriber dialed is busy. OpenScape 4000 subscribers, however,
cannot intrude on EB5 subscriber calls. Another application is the connection
of adapters for analog networks (AAN) to OpenScape 4000 via the TFZ interface.
Figure 115. Example of connection and networking
Line circuit parameter USD
Analog trunk line circuits reserved for reverse dialing in incoming
traffic must be prepared in the class of trunk (COT) with the USD circuit
parameter for unrestricted suffix-dialing. This is not necessary for
outgoing step by step dialing in tie trunk traffic.
- You can expand the class of trunk for unrestricted suffix-dialing as
follows:
CHA-COT:COTNO=x,COTTYPE=COTADD,PAR=USD;
RICHT parameters
The RICHT parameters ROUTOPT=NO and REROUT=NO must be
set.
LODR parameters
The configured LODR should begin with COXSEND.
Digit input timer
The digit input timer T302 for digital trunks (S0/S2) must be extended
to 30 seconds.