6-pin modular connectors on both ends of an 8-conductor shielded round twisted pair 26 AWG cable.

6-pin modular connectors on both ends of an 8-conductor shielded round twisted pair 26 AWG cable.

| Pin | Single-ended | SEI bus | Color |
|---|---|---|---|
| 1 | Index TTL4 (ED2) |
Ground | Brown |
| 2 | Ground | Busy+ (active high, quiescent low) Analog+ |
Green |
| 3 | A channel TTL1 (ED2) |
Busy- (active low, quiescent high) Analog- |
White w/ Green Stripe |
| 4 | Power | Power | White w/ Brown Stripe |
| 5 | B channel TTL2 (ED2) |
DataL (quiescent high in Mark condition) | Blue |
| 6 | Ground TTL3 (ED2) |
DataH (quiescent low in Mark condition) | White w/ Blue Stripe |
6-pin modular connectors on both ends of an 8-conductor shielded round twisted pair 26 AWG cable.