Max 8/16 and T1/E1 User’s Guide – Chapter 1
Page 5
the last is number 8. If you have 16 ports, the first port in the
bottom row is port number 9 and the last, at the lower right, is
number 16.
Ports also have logical numbers, used by the Routing Table, which
are different from their physical numbers. (See Routing Table
Configuration on page 36 in this Guide.)
Identifying FXS and FXO Ports
If you do not know which ports on your unit are FXS or FXO, you can
slide out the cards and read the labels on the individual port cards.
This section will explain that process.
CAUTION: The AVU boards can be damaged by static
discharge!
1. Before beginning, prepare a static-free surface on which to
place the cards when they are removed from the unit.
2. Employ an approved static-neutralizing wrist-strap and
ground wire to avoid damaging your unit with static
discharge.
R
EMOVING AN
AVU C
ARD
To remove an AVU card:
1. Turn off the power to the Max unit and unplug the power
cord.
2. Place the unit on a desktop or other secure surface with the
ports facing you.
3. Turn the two thumbscrews on the top card counter-clockwise
until they are fully unscrewed (you feel springs pushing the
screws out).
4. Grasp the screws between your thumbs and forefingers and,
while pushing against the cabinet with the free fingers, pull
the card straight out of its slot. It should come free with
slight resistance.
CAUTION: DO NOT use tools to pry the card from its slot!
DO NOT remove individual ports from the AVU card!
F
INDING THE
P
ORT
L
ABELS
FXS port identification markings are visible on the right side
of the port card, as viewed with the AVU thumbscrews facing
you. The label can be seen at the arrow in Figure 2, below.
