Combo Twisted Pair Ports And Sfp Slots; Table 5: Combo Port Pairs - Allied Telesis AT-GS924MX Installation Manual

Chapter 1: Overview

Combo Twisted Pair Ports and SFP Slots

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Two twisted pair ports and SFP slots are paired together to form combo
port pairs. Each pair contains one 10/100/1000Base-T port and one SFP
slot. The combo port pairs for the switches are listed in Table 5.
Model
AT-GS924MX and AT-GS924MPX
AT-GS948MX and AT-GS948MPX
The rule to follow when using the combo port pairs is to use only one
device in a pair at a time. For example, if you decide to use twisted pair
port 25R on the AT-GS924MX or AT-GS924MPX Switch, then you cannot
use SFP slot 25. Or, if you choose to use SFP slot 49 on the
AT-GS948MX or AT-GS948MPX Switch, then you cannot use the twisted
pair port 49R.
The rules for using the combo port pairs are listed here:
You may use either the twisted pair port or SFP slot of a combo

port pair, but not both at the same time.
If you connect both the twisted pair port and SFP slot of a combo

port pair to network devices, the SFP slot takes priority, and the
twisted pair port is blocked.
The SFP slot becomes active when the SFP transceiver

establishes a link to a network device.
The twisted pair port and SFP slot of a combo port pair share the

same settings, such as VLAN assignments, access control lists,
and spanning tree.
Table 5. Combo Port Pairs
10/100/1000
Base-T Port
25R
26R
49R
50R
SFP Slot
25
26
49
50