
GraphiteVPX/GbE 16+4-Port - Managed Carrier Ethernet Switch
Users Guide
Document: CTIM-00461
Revision: 0.02
Page 17 of 26
Connect Tech Inc. 800-426-8979 | 519-836-1291
Date: 2016/10/27
Port LED Details
The VPG uses a serialized LED stream to output the LED status for each port. This serial signal is intended to
be run through shift registers as shown below to de-serialize the stream. To accommodate the 16 ports
(VPG202 – Backplane only) requires the use of four 8-bit shift registers (or eqivilant) setup in the
configuration shown below.
An example circuit is shown below, or an example schematic can be