Max 8/16 and T1/E1 User’s Guide – Chapter 4
Page 38
L
OGICAL
P
ORT
N
UMBERING
The difference between physical and logical port numbering is that, in
logical port numbering, the FXS and FXO ports are counted separately,
and the count starts from zero instead of one. So the first FXS port
will be FXS 0, and the first FXO port will be called FXO 0.
If you have all FXS or all FXO ports:
Take the number of the port as it appears in the Account
Setup page of the Max Web Manager, and subtract one (since
we count from 0 instead of 1). For example, if you had all FXS
ports, the logical port number for physical port 11 would be
FXS 10 (11 – 1 = 10).
If you have both FXO and FXS ports:
Note which ports are FXS and which are FXO. If necessary,
refer to Port Identification with the Web Manager on page
24 in this Guide. Write down the physical port numbers in the
table in Appendix E.
From the top left to the bottom right, count the FXS ports
starting from 0, and then count the FXO ports starting from 0.
As you count, write down each port’s logical number next to
its physical number.
In Figure 21, for example, 3 FXO ports are present. The first
one (at the upper left) is logical port FXO 0, the second is
logical port FXO 1, and the third is logical port FXO 2.
Figure 21 – Logical Port Numbering
A Physical and Logical Port Number Table, Appendix D in this
Guide, has been provided for you to write down the positions of your
FXS and FXO ports so that they are available for future reference.
A
V
U
1 2 3 4
5 6 7 8
1
2
3
4
5
6
7
8
AVU
1 2 3 4
5 6 7 8
1
2
3
4
5
6
7
8
Port
1
Port
2
Port
4
Port
5
Port
6
Port
7
Port
8
Port
11
Port
9
Port
10
Port
12
Port
13
Port
14
Port
15
Port
16
Port
3
FXO
FXO
FXO
FXS
FXS
FXS
FXS
FXS
FXS
FXS
FXS
FXS
FXS
FXS
FXS
FXS
Logical Port
"FXS 8"
Logical Port
"FXO 2"
