Page 2-12
Specifications
INTER-TEL
®
AXXESS
®
MANUAL VERSION 11.0 – May 2008
Multiple-Chassis Configurations
NOTE: CPU020/PCM cards are required for tri- and quad-chassis systems. In addition, ver-
sions 8.0 and later require a CP Server for tri- and quad-chassis systems. This means that the
first chassis must have an EAC so that it can connect to the CP Server.
4.5 For maximum port capacity without an ATM Switch, four basic chassis may be con-
nected together to form a quad-chassis system (see Figure 2-1 on page 2-13 and Figure 2-3 on
page 2-14). Like the other three chassis, the fourth chassis has its own power supply unit and
eight-slot circuit cardfile assembly. However, unlike the first and third chassis, the fourth chas-
sis does not require its own CPU020/PCM card. The first and second chassis (master dual-
chassis) are connected to the third and fourth chassis (slave dual-chassis) through a special
fiber-optic cable.
4.6 For maximum port capacity with an ATM Switch, four dual-chassis systems may be
connected together to form an eight-chassis node (see page 2-13 for an example of an ATM
system). Like the dual chassis, each second chassis has its own power supply unit and eight-
slot circuit cardfile assembly. Each chassis pair also has its own CPU020/PCMA card, which is
connected to the ATM Switch through a CAT5 or multi-mode fiber (MMF) cable. Because
each pair is independently connected to the ATM Switch, there is no master-slave relationship
like there is in a quad-chassis system.
Multiple-Chassis Configurations
4.7 With the fiber-optic link, there are a number of valid ways to connect multiple chassis
together, as shown in Figures 2-2 and 2-3 on the following pages. Note that for reference pur-
poses, multiple-chassis configurations are always numbered as shown below – even though the
master section may have only one actual chassis installed. (Chassis can be rack mounted
instead of the horizontal arrangement shown on page 2-13, but the numbering and connections
remain the same.)
NOTE: In tri-/quad-chassis installations, the master T1, E1/PRI, or T1/E1/PRI card (if one
exists) should be located in the master dual-chassis. The first (master) and third (slave) chassis
in all tri-/quad-chassis installations must be equipped with 9 amp power supplies. The PCM-F
card or PCM-F/EAC requires a 9 amp power supply. Also, if the two portions of a tri-/quad-chas-
sis system are installed on the same vertical plane on the same MDF, the first pair of chassis
(master dual-chassis) must be separated from the second pair of chassis (slave dual-chassis)
by at least one foot to provide proper air circulation. In addition, tri-/quad-chassis systems
require a CP Server to run software version 8.0 or later.
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