Ericsson LBI-39001 Bedienungsanleitung PDF herunterladen (Seite 5)

LBI-39039

2. INTERFACES AND REQUIREMENTS

2.1. EDACS INTERFACE

An EDACS-originated call appears to the MD110 as an incoming DID call from an external T1/E1 ISDN trunk. One

external T1/E1 ISDN trunk is dedicated to EDACS; it is a TLU-63/1 (T1) or TLU-64/1 (E1) board in the MD110. This

allows 23/30 simultaneous calls.

• For calls to the PSTN, the number begins with an LCR code.

• For calls to MD110 extensions, the number is the extension number.

2.2. PSTN/PBX INTERFACE

A PSTN-originated call appears to the MD110 as an incoming trunk call. This interface can be analog or digital, and it

can be a CO, DID, or a tie trunk. A PBX-originated call appears to the MD110 as an incoming trunk call. This interface can

be analog or digital, and it can be a tie trunk.

Minimum Requirements for the PSTN/PBX Trunks

• The ability to perform end-to-end tone signaling while in the connected state.

• The ability to properly send and receive call clearing signals.

• DID to radios requires trunks capable of passing dialed digits to the MD110.

Trunks or lines with forward and backward line clearing are highly recommended. See the explanation below.

With Line Clearing Without Line Clearing

When the Network hangs up, the interconnect call

will clear and free interconnect and radio resources.

When the Network hangs up, the radio must clear the

interconnect call or let it clear due to hang-time expiration or

conversation limit expiration to free interconnect and radio

resources. This problem would be very significant for full

duplex calls, since the user must clear the call or the call will

clear only after the conversation limit expiration.

With B-Answer Without B-Answer

• Radios will hear IMC-generated ringback for

outbound calls.

• Ringing duration on outbound calls will be

limited to 30 seconds by the PI.

• In applications where billing is performed, the

customer will not be billed unless the called

party answers.

• Radios will hear MD110 or Network ringback for

outbound calls.

• Ringing duration on outbound calls will not be limited

by the PI.

• In applications where billing is performed, the customer

will be billed for calls even if the called party does not

answer.

T1 or E1 tie trunks are highly recommended for connecting the MD110 to another PBX.

Calls to EDACS require DISA access and the radio ID, and may require an LCR code. Calls to MD110 extensions

require an extension number.

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