Specifications

CONTENTS
2.3
DIGITAL TRUNK CARD (DTPRI)
The Digital Trunk Card (DTPRI) supports either T1 or PRI (ISDN) service. The DCS 400si
supports six T1/PRI cards per cabinet or a total of 12 per system. The five LEDs on the
front of the card provide indications for Activity, Synchronization, Loss of Signal, Alarm
Indicating Signal and Level 2 Activity. It can be inserted into any universal slot and uses 24
ports.
When used as T1 service this card provides up to 24 circuits in any combination of the
following signaling protocols:
l Loop start
l Ground start
l DID (Direct Inward Dialing)
l E & M tie trunk or two way DID calling
NOTES: Caller ID is not available on T1 span but Automatic Number Identification (ANI)
via inband DTMF signaling is supported.
When used for ISDN–PRI service, this card can support National ISDN (NI2), No. 5 ESS,
and DMS 100 custom protocols. It can be inserted into any universal slot. This card provides
up to 23 ISDN “B” channels and 1 ISDN “D” channel.
8 BRI (BASIC RATE INTERFACE–D8BRI)
The 8 BRI card supports 8 trunk or station level ISDN Basic Rate Interface (i.e., 2B plus D)
circuits. The nine LEDs on the front of the card provide ISDN (Layer 2 protocol) activity
indications per BRI circuit and one busy/idle LED. The DCS 400si supports 20 BRI S/T
(station or trunk) interface cards. It can be inserted in any universal slot. Each D8BRI uses
16 ports.
24 DIGITAL LINE INTERFACE (D24DL)
The digital line interface card provides service to all DCS keysets, 32 button AOM, serial
interface module (SIM), door phone interface module (DPIM) and the 64 button module.
This card is a twenty four circuit digital station interface card that provides selectable
1B+D service or 2B+D service. It can be inserted into any universal card slot. When se-
lected for 2B + D service each card uses 48 ports instead of 24. When selected for 1 B +
D service each card uses 24 ports.
16 SINGLE LINE INTERFACE with MESSAGE WAITING (D16SL)
This card is a sixteen circuit analog station interface for industry standard single line tele-
phones or other analog peripheral devices (voice mail, etc.). It provides the overvoltage
protection required for connection to the telephone company off premises extension cir-
cuits (OPX). Industry standard Message Waiting voltage for single line message waiting
lamps is also provided by this card. It can be inserted into any universal card slot. Each
D16SL uses 16 ports.