Aastra Dialog 4425 IP Vision User Manual page 214

QSIG-MD Private Network Services
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Non-IP Hand-Over Service
If your telephone system is integrated within a QSIG-MD private
network, and your calls are routed over your company's Intranet
network, which is managed according to the IP-Trunking technique,
you may also have access to a non-IP hand-over service.
The quality of communications established over the Internet network
is generally good, mostly thanks to the implementation of a system
that gives voice calls priority over data transmitted on the IP network.
However, occasions may arise where the quality of the voice trans-
mission of calls over the IP network is reduced. The non-IP hand-
over service then allows you to request that your current call be
switched to a possible private digital tie line, or to the public net-
work (depending on availability).
To activate this service during an ongoing call established over your
z
company's IP network:
Dial "7", which usually grants access to the Non-IP hand-
over service.
Your call on the IP network is switched over to the non-IP network
immediately, without interrupting your call.
Note: This service is only available when your call has been
established on the IP network. The non-IP hand-over service
is not available for QSIG-MD private networks using an
Intranet network managed according to the IP-Networking
technique.
MD Evolution – Dialog 4425 IP Vision