T1/Pri Or E1/Pri Networking; T1/Pri And E1/Pri Programming - Mitel MiVoice Office 250 Installation And Administration Manual

T1/PRI or E1/PRI Networking

A T1/PRI or E1/PRI connection can be used for connecting two system nodes in a network. Each
network span requires two T1M or T1M-2 modules, one for each end of the span. Point-to-point
clear channel T1 spans are used to connect the nodes. For each network span, order a clear channel,
point-to-point T1 span from the service provider (not PRI service, even though you will be using
T1/PRI or E1/PRI). The following figure illustrates a sample T1/PRI connection.
In a T1/PRI or E1/PRI network that involves multiple CO and T1M or T1M-2 module connections,
the line buildout is determined by each connection. In the example shown above, the two T1M or
T1M-2 modules connected to the CO receive reference clock from the public network and are slave
clocks (Slaves to Public Network Setting in DB Programming). The two modules that are connecting
the Mitel systems do not draw reference clock from the public network. T1/PRI #2 on system #1 is
the master clock (Master for Private Network setting in DB Programming) and T1/PRI #1 on system
#2 is a slave clock (Slave for Private Network setting in DB Programming).
Network installation recommendations include the following:
• Each node must have at least one central office trunk. Emergency calls should be programmed
to use the local trunk.
• If an external voice processing system is shared by multiple nodes, all of the nodes should have
access to the node where the external voice processing system is located, with a minimum
number of hops through other nodes. This will have significant impact on the network layout.
The network does not allow one node to use the resources from another node (conference and
speakerphone resources, etc.) with the exception of external page ports and message print output.

T1/PRI and E1/PRI Programming

You can also configure T1/E1 PRI networking using the Networking Wizard. This section describes
each portion of the networking in DB Programming. For programming information discussed here,
refer to the MiVoice Office 250 Features and Programming Guide.
A port on the T1M or T1M-2 module can be configured for T1/PRI or E1/PRI networking. The T1/PRI
and E1/PRI programming has a field called "ISDN Switch Type" (this field is not present in a module
configured for T1 programming). The ISDN switch types provided for networking are Private
Networking and IP Private Networking. To program a port on the T1M or T1M-2 module for
networking, use the ISDN Switch Type list box to select Private Networking or IP Private Networking.
When the port is programmed for T1/PRI or E1/PRI networking (Private Network switch type), the
system automatically creates a node trunk group. (All B-Channels residing on the same port are in
the same node trunk group.) The system allows up to 3 node trunk groups per node (one for each
T1/PRI or E1/PRI configuration). MiVoice Office 250 Features and Programming Guide
Figure 5: Sample T1/PRI Connection
T1/PRI #1
CO 1
T1/PRI #2
T1/PRI #1
T1/PRI #2
System #1
System #2
Private Networking
CO 2
395