Aastra Telecom 4223 manual QSIG-MD Private Network Services, 142

QSIG-MD Private Network Services

QSIG-MD Private Network Services

Depending on the configuration of your telephone system, this may be integrated within a QSIG-MD private network, which groups various MD Evolution systems within your company.

These systems may be connected by:

•Digital tie lines to a telecommunications operator. These digital tie lines are therefore reserved for private calls within your company’s network.

•Your company’s Intranet network, local area network (LAN), or wide area network (WAN). In this case private telephone calls between network calls are transmitted over the IP network, at the same time as data that is exchanged between your company’s various sites.

In the second case, there are two possible techniques:

•The first, called IP-Trunking, uses proprietary messages that are exchanged over the IP network. This applies when up to 7 MD Evolution systems are networked.

•The second technique, called IP-Networking, uses standardised IP H.323 messages that are exchanged over the IP network. This applies for a wide area network, which may include more than 100 MD Evolution systems.

No matter the case and regardless of the private call supports used within your company’s private network, the majority of the telephone services available locally between two of your facility’s internal users become available to the private users connected through remote nodes.

Moreover, if IP-Trunking networking occurs over an IP network,

anon-IP hand-over service is also available for occasions where there may be a downgrade in the voice transmission over the IP network.

142 MD Evolution – Dialog 4223 Professional