Alloy Computer Products GSM-24T2SFP, GSM-8T16SFP, GSM-16T2SFP user manual Cabling Requirements

GSM Series User Manual

2.1.2. Cabling Requirements

To help ensure a successful installation and keep network performance at optimum levels, take care to use Cat.5e grade or higher cabling. Ensure that stranded core UTP cable, if used, runs for no more than 10 metres, and that solid core runs for a maximum of 100 metres. Poor cabling is the most common cause for network dropouts or poor performance.

2.1.2.1. Cabling Requirements for UTP Ports

•For Ethernet copper network connections, the UTP cable used must be Cat. 3 grade as a minimum, with a maximum length of 100 metres

•For Fast Ethernet copper network connections, the UTP cable used must be Cat. 5 grade as a minimum, with a maximum length of 100 metres

•For Gigabit Ethernet copper network connection, UTP cable used must be Cat.5 grade or higher, with a maximum length of 100 metres. Cat.5e grade UTP cable is recommended.

2.1.2.2. Cabling Requirements for 1000SX/LX/ZX SFP Modules

There are two categories of fibre optic modules - multimode (MM) and single-mode (SM). The later is categorised into several classes by the distance it supports. These are SX, LX, LHX, ZX and EZX. The majority of mini-GBIC modules available use a LC type connector. The connector types used currently on Alloy mini-GBIC modules are LC and WDM SC, for the following module types:

•Gigabit Fibre with multimode LC SFP mini-GBIC modules

•Gigabit Fibre with single-mode LC mini-GBIC modules

•Gigabit Fibre with single-mode/single core WDM SC 1310nm SFP mini-GBIC modules

•Gigabit Fibre with single-mode/single core WDM SC 1550nm SFP mini-GBIC modules

The following table lists the types of fibre optic cable that are supported by SFP mini-GBIC modules installed in Alloy GSM Series Switches. Other cable types not listed here may be supported; please contact the supplier of your switch for details.

IEEE 802.3z Gigabit Ethernet 1000SX 850nm

Multimode Fibre Cable and Modal Bandwidth

Multimode 62.5/125μm		Multimode 50/125μm
Modal	Range	Modal	Range
Bandwidth		Bandwidth
160MHz-Km	220m	400MHz-Km	500m
200MHz-Km	275m	500MHz-Km	550m

1000Base- LX/LHX/XD/ZX

Single-mode Fibre 9/125μm

Single-mode transceiver 1310nm 10Km, 40Km

Single-mode transceiver 1550nm 40Km, 70Km, 100Km

1000Base-LX Single Fibre (WDM SC)

Single-mode	TX(Transmit)	1310nm
*20Km	RX(Receive)	1550nm
Single-mode	TX(Transmit)	1550nm
*20Km	RX(Receive)	1310nm

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