Valiant STM-1/4 (STM-4) - Comparision with other STM-1 / STM-4 vendors: STM-4 - E1, T1, E3, DS3, E4, STM-1e (electrical), STM-1 (optical) and 10/100 Mbps ethernet tributaries

Vendor	Valiant	Nortel	Marconi	Tellabs/ Fibcom	Siemens	Huawei	ECI	ZTE
Product Name	VCL-STM-1/4	TN-1X/4	SMA4	Focus AC1	SMA 1/4	Optix 155/622	SDM 4	ZXSM-150/ 600/2500
Features
DATA SUPPORT
Ethernet	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
SOFTWARE
Auto-discovery & flow-through provisioning	Yes	Yes	No	No	No	No	No	No
OPTICS
Very Long Spans (VLR, JE) & integrated amplifier support	Yes (spans up to 200 kms can be realized)	No	No	No	Yes	No	No	Yes