Lbus - NEC Univerge sv8500 Manual

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When Call Retention function is inactivated or when any key on the terminal such as Line/Feature key is

pressed during a conversation using a headset/speaker, a call will be disconnected in 60 to 90 seconds (Call

can be retained until the key operation.).

When Call Retention function is inactivated, if the terminal starts to communicate with the Telephony Serv-

er, a call will be disconnected after the SIP timeout.

If the firmware version below 2.00 is equipped to the terminal, a call will be disconnected within two min-

utes regardless of the key operation.

Call can be retained if the Telephony Server does not send the reset signal to each terminal. However, in

the following case, call cannot be retained because the Telephony Server sends the reset signal.

• If Only one-way link (from terminal to the Telephony Server) down.

• If Health Check error occurs between the Telephony Server and terminal, and Rest signal is sent to the

For DtermSP30 with Software Version 2, a call can be retained up to two minutes.

If a PS hands over during a call, the call will be disconnected.

Configuration command setting is required on each equipment side. For more details, see "MG Based Call

Retention" on Chapter 2 of Data Programming Manual - Business.

Call can be retained by MG Based Call Retention. For more details, see "MG Based Call Retention" on

Chapter 2 of Data Programming Manual - Business.

For IP equipment/terminals which cannot use Call Retention function, a call can be retained until Health

Check timeout occurs.

Call Protected Re-Registration [C-203] is available since SP-3884 MG PRI PROG-A Issue 10 or later.

When a Telephony Server side terminal releases during a conversation after a temporary communication

failure between the Telephony Server and MG-SIP, MG-SIP may not send disconnection signals to the SIP

A release signal may not be sent to the network when a terminal on the Telephony Server side is released

after the occurrence of a temporary communication failure with the Telephony Server during a call.

The following table shows status for IP equipment/terminals when the Call Retention function is in active.

Not Available

A call can be retained. It can be retained even after the status of call

changes such as changing to a call on hold or a forwarded call.

A call can be retained. It cannot be retained after the status of call changes

such as changing to a call on hold or a forwarded call.

A call cannot be retained.

INTRODUCTION

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