NEC 2400 ipx Manuale Utente

7.

For Point-to-Multipoint connection, one IPTRK circuit card (assigned as FCCS signal controlling card by
the AFCH command), can control the B-channels of the same card, and also a maximum of 15 other
IPTRK circuit cards. It is not necessary to assign the trunk data for a time slot as a controlling channel.See
the following figure.

8.

During IPTRK circuit card-related tandem connection, speech quality can become poor, or dual
connection failure may occur. DTMF and FAX relay cannot be used.

9.

Any service that is not available for the FCCS network, is not available utilizing this service.

10.

This feature supports QoS (Quality of Service) function.

11.

When a system message indicates “TCP link failure” due to data congestion on the router or IP network,
a call cannot be made via an IPTRK circuit card. When a call is attempted despite this, the caller hears
busy tone.

12.

When a system message, related to “TCP link failure”, is created during call origination or speech, that
call’s speech channel is automatically restored via patrol function.

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Bch

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Bch

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Bch

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Bch

PBX

IPTRK 

IPTRK

IPTRK

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PIM

When the connection is Point-to-Multipoint, port accommodation for the IPTRK circuit card is shown below. All the available time slots on 
the controlling IPTRK circuit card can be assigned as the B-channel.

For 16-port Slot

HW

For 32-port Slot

HW

An IPTRK circuit card, assigned as the FCCS signal controlling card by the AFCH 
command, can control the B-channels of the card and a maximum of 15 other cards.

Intranet

Symbols:
IPTRK:

IP Trunk

:

Bch (Speech)

POWER

Router

AFCH