Call routing
241
System functions and features as of R3.0
syd-0367/1.3 – R3.0 – 03.2013
6. 7 Exchange-to-Exchange Connection
Exchange-to-exchange traffic covers all interactions involving at least 2 users in the
public network and at least 1 internal user.
6. 7. 1 Exchange-to-Exchange Connections
In an exchange-to-exchange connection two seized exchange lines to the public
network are connected with each other locally in the communication server.
Restrictions applicable throughout the system
Exchange-to-exchange traffic can be restricted or barred throughout the system.
The setting is not effective for inter-network connections to the public network or
to on one side only, e.g. PISN-PISN or PISN-exchange.
The system supports exchange-to-exchange traffic on both digital and analogue
network interfaces. The following settings are possible:
• Not enabled: Exchange-to-exchange connections not allowed
• Digital-digital only: Both network interfaces must be digital
• Digital-analogue also: At least one network interface must be digital
• Analogue-analogue also: Both network interfaces can be analogue
If sections of exchange-to-exchange connections are analogue, the transmission
quality will decrease.
If a user tries to set up an inadmissible exchange-to-exchange connection (e.g. by
initiating an exchange enquiry call and then hanging up), the second connection is
disconnected and user B obtains long ringing after hanging up, to be able to an-
swer the first connection on hold. This is the case for example if one or both net-
work interfaces are analogue and the parameter is Exchange-to-exchange connec-
tion = Digital-digital only.
Tip:
In some countries private operators of communication systems are not
authorized to transfer an outside call back to the public network. Explain
the situation regarding operating rights to operators of communication
servers already at the negotiation stage.
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