NEC Univerge SV9100 Manual page 473

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Any standard SIP terminal can perform an Unattended (Blind/Unsupervised) transfer.

Default Setting

System Availability

Program 10-05-50 (Peer-to-Peer Mode) must be disabled for the Unattended

Transfer to be performed.

A SIP terminal must receive the re-Invite message of Session Timer in a state of

Unattended transfer.

When the transferred destination terminal is busy, unanswered or the extension

number in the Refer-To header is wrong or out of service, the call is sent back to the

original terminal.

If the standard SIP phone is placed on hold/park, from another extension, this call

cannot be transferred until the station that placed the call on hold/park retrieves the

call. A unattended transfer can only be completed while both parties are in a talking

An Unattended Transfer can only be performed to the following locations:

Extension Number

Department Group Pilot Number

ACD Group Pilot Number

Operator Access

Trunk/Alternate trunk access code

F-Route Access

Network Access

Quick transfer to Voice Mail is not supported when using Unattended Transfer.

Standard SIP Terminal

IP Single Line Telephone (SIP)