Allied Telesis AT-GS950/16PS Installation Guide download pdf (Page 23)

AT-GS950/10PS, AT-GS950/16PS, and AT-GS950/48PS Switches Installation Guide

Combo Ports

The AT-GS950/8 and AT-GS950/48PS Switches have two combo ports

and the AT-GS950/16PS Switch has four combo ports. Each combo port

consists of one 10/100/1000Base-T twisted pair port and one slot for an

optional 100Base-FX or 1000Base-SX/LX SFP transceiver. The twisted

pair ports are identified with the letter “R” for “Redundant” on the front

faceplates of the units. The ports and slots are listed in Table 2.

The combo ports have the guidelines listed here:

 Only one port in a pair, either the twisted pair port or a

corresponding SFP module, can be active at a time.

 The twisted pair port is the active port when its SFP slot is empty,

or when an SFP module is installed but has not established a link

to an end node.

 The twisted pair port automatically changes to the redundant status

mode when an SFP module establishes a link with an end node.

 A twisted pair port automatically transitions back to the active

status when the link is lost on the SFP module.

 In nearly all cases, a twisted pair port and an SFP module share

the same configuration settings, including port settings, VLAN

assignments, access control lists, and spanning tree.

 An exception to the shared settings is port speed. If you disable

Auto-Negotiation on a twisted pair port and set the speed and

duplex mode manually, the speed reverts to Auto-Negotiation

when an SFP module establishes a link with an end node.

Table 2. Combo Ports

Switch Twisted Pair Port SFP Slot

AT-GS950/10PS

9R 9

10R 10

AT-GS950/16PS

15R 15

16R 16

AT-GS950/48PS

45R 45

46R 46

47R 47

48R 48

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 61 62

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Allied Telesis AT-GS950/16PS Installation Guide Page 23