Chapter 1. Introduction

INTERFACE OPTION CARDS

Optional interface cards may be purchased to equip the T3SU 300 with up to three additional ports. Both HSSI and V.35 interface cards are available.

HSSI Card

The optional HSSI card plugs into one of the three card slots on the rear of the T3SU 300. With optional HSSI cards installed, the total

44.2Mbps bandwidth of the T3 can be divided among the total number of ports to provide multiple data channels over the T3. The total bandwidth of the T3 can be divided among the available ports in any fashion, as long as the divisions are on 75 kbps boundaries.

The HSSI card can be hot inserted or swapped. When it is inserted in a slot on the rear panel and its faceplate is secured to the rear panel of the T3SU 300 with the integral thumb screws, a PCMCIA type connector on the card mates with a compatible connector on the main board of the T3SU 300. A standard 50-pin HSSI connector is then available for DTE connections. See the section DTE Port Interface Card Slots on page 2-4 for more information on installing option cards.

V.35 Card

The optional V.35 card plugs into the card slots on the rear of the T3SU 300 to provide a V.35-type DTE interface. Operation of the V.35 card is similar to that of the HSSI card except that the maximum bandwidth of the V.35 card is limited to 10 Mbps.

Like the HSSI card, the V.35 card can be hot inserted or swapped, and it installs just as the HSSI card does. Instead of the standard HSSI connector, this card contains a standard 34-pin V.35 connector for DTE connections. See the section DTE Port Interface Card Slots on page 2-4 for more information on installing option cards.

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T3SU 300 User Manual

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ADTRAN T3SU 300 user manual Interface Option Cards, Hssi Card