Isdn Basic Rate Interface Card (T-Point) - Tbri/4 (Vb-44530); E&M Trunk Card - E&M/4 (Vb-44560); Did Trunk Card - Didtr/8 (Vb-44520); Interface Card - T-1 (Vb-44550) - Panasonic DBS 576HD Technical Manual

ISDN Basic Rate Interface Card (T-point) - TBRI/4 (VB-44530)

This supports T-point Integrated Services Digital Network (ISDN) Basic Rate Interface (BRI)
(2B+D:144kbps). This card can be installed in any flexible slot. Up to 4 T-point ISDN lines can be
connected to each TBRI/4 Card.
The T-point BRI Unit supports information transferring capability (speech and data) at the CO trunk.
The TBRI/4 Card connects via NT1 (Network Termination Unit/Type 1) to the T-point ISDN interface.
E&M Trunk Card - E&M/4 (VB-44560)
This card supports E&M type tie line interface (Speech
methods that are supported include Immediate and Wink methods. Each E&M card includes 4
circuits.
When installed in any flexible slot, the E&M Trunk Card supports call signal detection and answer
from other PBX or carrier equipment, calling to the E&M tie line, dial sending and speech.
The E&M interface can connect to another PBX with E&M capability (Types 1, and 2 are supported).
External safety devices (available from standard telecommunications suppliers) are required when
installing this unit outside the building.

DID Trunk Card - DIDTR/8 (VB-44520)

This card supports 8
The DID can be either Dial Pulse (10PPS) or DTMF (only for Wink). DTMF circuits are used when the
Wink method is selected.
An external –48V Power Supply (VB-44022) must be installed in the cabinet with the DID Trunk Card.
T-1 Interface Card - T-1 (VB-44550)
The T-1 interface is a digital CO line card that provides up to 24 voice channels over a four-wire
circuit.
The T-1 card can be set to support either 8, 16, or 24 channels.
Unlike most other cards, due to the interaction between card slots, the T-1 card must be installed in
selected flexible card slots. With the HD's new high-density design, no other neighboring slots are
restricted when this card is installed.
The T-1 interface requires a DSU or CSU for connection to the carrier circuit. A Network Sync card is
also required.

Voice over IP Trunk Card - VoIP-TRK (VB-44550)

The VoIP-TRK/8 Voice over IP Trunk Card provides 8 voice channels over an IP network line. The
card connects to a 10/100 Mbps Ethernet Local Area Network (LAN) with an RJ-45 connector.
The VoIP-TRK/8 card is equipped with one CODEC/8 voice processing unit. One additional
CODEC/8 unit (VB-445801) can be mounted on the card to provide 16 voice channels.

Extension Cards

Digital Extension Card - DEC/8 (VB-44610)

This card provides 8 digital circuits. Each circuit supports the Panasonic Digital Key Telephone, Digital
Single Line Telephone, DSS/72, and EM/24. Supply voltage for the telephones is supplied by the
digital circuits.
24 Chapter 2 - System Hardware
analog DID incoming CO lines using Immediate and Wink signaling methods.
path 4W/2W, Control line 4W). The signaling