Allied Telesyn International Corp AT-9448Ts/XP Installation Guide download pdf (Page 26)

Chapter 1: Overview

Redundant Twisted Pair Ports

Four of the twisted pair ports on the AT-9424Ts and AT-9424Ts/XP

Switches are paired with SFP slots. The twisted pair ports are identified

with the letter “R” for “Redundant” as part of their number on the front

faceplate of the unit. The ports and slots are listed in Table 2.

Follow these guidelines when using these ports and slots:

 Only one port in a pair can be active at a time. It can be either the

twisted pair port or the corresponding SFP module.

 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.

Note

These guidelines do not apply to the XFP slots on the AT-9424Ts/XP

and AT-9448Ts/XP switches.

Table 2 Twisted Pair Ports Matched with SFP Slots

Model Ports and Slots

AT-9424Ts and

AT-9424Ts/XP

21R with SFP slot 21

22R with SFP slot 22

23R with SFP slot 23

24R with SFP slot 24

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 99 100

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Allied Telesyn International Corp AT-9448Ts/XP Installation Guide Page 26