Product guide

Chapter 3: Installation 3-6
Connection
Connect to Line Interface - PBX
NOTE: When the Tenor is software configured as an NT (connecting to a PBX), termination
should always be enabled (default). See the Command Line Interface Guide for configura-
tion information.
Since there are many different PBX devices and connection methods, your individual PBX will
determine the connection method you use to connect to the unit. For example, your PBX may be
connected using a patch panel, punch down block, wire wrapped blocks, etc. If you are not sure
about installation procedures, contact the network administrator or review the documentation you
received with the PBX.
Adjacent port pairs (i.e., 1/2, 3/4, etc.) are configured by default not to connect to each other (Power
Off Bypass) when the unit is turned off, or when the unit is in Offline mode. You should set Power-
OffBypass to 1 when connecting one of the lines to a PBX, and its adjacent pair to the PSTN. This
will ensure connectivity between the PSTN and PBX when the unit is turned off or when in offline
mode. However, if you have adjacent port pairs that are connected to similar devices (i.e., both
going to PSTN), you do not want the two ports to be connected to each other in case of power off or
offline, and you should set the PowerOffBypass = 0. Each pair of ports (1/2, 3/4, 5/6 and 7/8) have
their own online/offline and power off bypass control. See the Configuration Manager online help
or the Command Line Interface (CLI) guide for specific configuration information.
You may use your PBX documentation, along with other PBX materials, to determine how to con-
nect the other end of the RJ-45 cable to your PBX. See Chapter 2: Hardware Components for the
RJ-45 cable pinouts you can use to acquire another cable or adapter that may be required to connect
your specific PBX to the unit. No changes are required to the PBX itself; you will need only the cor-
rect cable or adapter.
The instructions which follow tell you how to connect an RJ-45 cable (included in your package)
between one of the eight network ports on the Tenor BX and a PBX. See Chapter 2: Hardware Com-
ponents for a list of RJ-45 cable pinouts you can use to make a custom cable.
Figure 3-4 Connect to Line Interface
Connect to Line Interface as follows:
PBX
Insert ports 1-8
RJ-45 Crossover
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