Panasonic DBS-576 Technical Manual page 22

This unit provides network synchronization and is required with digital circuits such as ISDN and T1.
The SYNC card synchronizes the PCM clock with an outside resource. When digital circuits are used,
one SYNC card is required and installs on the CPC-96, TSW-288, or TSW-576 card.
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The Loop Start Card supports up to 8 loop start CO lines and can be installed in any flexible slot. This
card meets UL1459 safety requirements, and can be directly connected to CO lines.
This card supports both Loop Start and Ground Start Trunks. Up to 8 CO lines of any combination of
types can be connected. This card installs in any flexible slot. An internal –48V Power Supply (VB-
44022) must be installed in the same cabinet with the Loop Start/Ground Start Card.
This card meets UL1459 safety requirements, and can be directly connected to CO lines.
This card supports Caller ID on loop start trunks. This unit installs directly on top of the Loop Start
Trunk Card (VB-44510), and supports all 8 of that Card's circuits for Caller ID.
This supports T-point Integrated Services Digital Network (ISDN) Primary Rate Interface (PRI)
(23B+D/24B:1544kbps) and also S-point ISDN PRI.
The PRI card can be set to support either 8, 16 or 23/24 channels. When the card is set for 16
channels, the card logically occupies 2 flexible card slots. When the card is set for 23/24 channels, the
card logically occupies 3 flexible card slots.
Unlike most other cards, due to the interaction between card slots, the PRI card must be installed in
specific Free Slots. Up to 3 PRI cards can be installed in a single cabinet. A fully configured 6-cabinet
system can support up to 18 PRI cards.
T-point PRI requires a DSU (Digital Service Unit) for connection to the carrier circuit.
A Network Sync card is also required.
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.
This card supports E&M type tie line interface (Speech pass 4W/2W, Control line 4W). The signaling
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.


22 Chapter 2 - System Hardware