SFP1G·since 2001 (SFP MSA)

SFP, The Gigabit workhorse. Campus access, branch uplinks, legacy refreshes.

Small Form-factor Pluggable, defined by SFF-8074i and SFF-8472. The original 1G transceiver form factor, still the default for campus access, branch WAN edges, video surveillance fiber drops, and industrial-control gigabit links. Single SerDes lane at 1.25 Gbps.

Specifications

MSA references

SFF-8074i (mechanical) · SFF-8472 rev 12 (management / DDM)

Electrical interface

1 lane × 1.25 Gbps NRZ SerDes

Power consumption

0.5 W – 1.2 W per module (varies by reach class)

Signalling

8B/10B encoded NRZ

FEC

None (not required at 1G)

Connector types

LC duplex (fiber) · RJ45 (1000BASE-T copper)

Available SKUs

Part number	Spec	Wavelength	Fiber	Reach	Notes
`NAP-SFP-T`	1000BASE-T	—	Cat5e / Cat6	100 m	RJ45 copper
`NAP-SFP-SX`	1000BASE-SX	850 nm	MM OM2/3/4	550 m	VCSEL
`NAP-SFP-LX`	1000BASE-LX	1310 nm	SM OS1/2	10 km	DFB
`NAP-SFP-EX`	1000BASE-EX	1310 nm	SM	40 km	DFB, extended reach
`NAP-SFP-ZX`	1000BASE-ZX	1550 nm	SM	80 km	DFB
`NAP-SFP-BX-D / BX-U`	1000BASE-BX	1310/1490 nm	SM, single strand	10 km	BiDi pair
`NAP-SFP-CWDM`	1G CWDM SFP	1270–1610 nm	SM	40 / 80 km	18 channels
`NAP-SFP-DWDM`	1G DWDM SFP	C-band	SM	80–120 km	100 GHz spacing

In production with

SFP modules are deployed across these platforms today. Full coding details are on the compatibility matrix.

Cisco Catalyst 9200/9300 access tier
Juniper EX2300/3400/4100
Aruba CX 6000/6100/6200/6300
Dell N1500/2000/3000 series
Industrial Moxa, Hirschmann, and Cisco IE switches

Operational notes

1000BASE-T runs warmer than fiber SFPs (~1.2 W vs 0.5 W). Verify chassis airflow on 48-port copper designs.

Industrial-grade variants (-40 to +85 °C) available for harsh-environment deployments.

Recommended for

Branch and campus access switching
IP video surveillance and access control
Legacy industrial controllers requiring fiber isolation
1G management uplinks on DC switches

Next: SFP+ (10G)