Yealink T21PE2 User Manual

Advanced Features
435
Description
It enables or disables the IP phone to add the Expires attribute to the Subscription-State header of the
BLA NOTIFY message.
Note: It works only if “account.X.shared_line” is set to 3 (Draft BLA). For teltronnic BLA, you need to set
the value of this parameter to 0 (Disabled). It is not applicable to T19(P) E2 IP phones.
Permitted
Values
0-Disabled
1-Enabled, the IP phone can only recognize the NOTIFY message whose host field is the same as the one
in the SUBSCRIBE message.
Default 1
Parameter
account.X.bla.subscribe_uri_build_type
[1]
<MAC>.cfg
Description
It configures the constitution of the URI for BLA subscription.
Note: It works only if “account.X.shared_line” is set to 3 (Draft BLA). For teltronnic BLA, you need to set
the value of this parameter to 1 (Enabled). It is not applicable to T19(P) E2 IP phones.
Permitted
Values
0-From Contact header in the SUBSCRIBE message sent by the server
1-According to the BLA number (configured by the parameter "account.X.bla_number")
Default 0
Parameter
account.X.bla_subscribe_period
[1]
<MAC>.cfg
Description
It configures the period (in seconds) of the BLA subscription.
Note: It works only if “account.X.shared_line” is set to 3 (Draft BLA). It is not applicable to T19(P) E2 IP
phones.
Permitted
Values
Integer from 60 to 7200
Default 300
Web UI Account->Advanced->BLA Subscription Period
[1]
X is the account ID. For T54S/T48S/T48G/T46S/T46G/T29G, X=1-16; for T52S/T42G/T42S, X=1-12; for T41P/T41S/T27G,
X=1-6; for T40P/T40G/T23P/T23G, X=1-3; for T21(P) E2, X=1-2; for T19(P) E2/CP920, X=1.
Intercom
Intercom is a useful feature in an office environment to quickly connect with the operator or the secretary. You can
press the intercom key to place a call to a contact that is answered automatically on the contact's phone as long as the
contact is not in an active call. In addition, the intercom key can be used for monitoring the status changes of a spe-
cific line on the phone.
Topics
Intercom Key Configuration
State Monitor for Intercom Contact
Outgoing Intercom Configuration
Incoming Intercom Configuration
Intercom Key Configuration
You can configure an Intercom key to provide users the ability to initiate intercom calls directly to the specified con-
tact.
The following shows configuration for an Intercom key.

Yealink T21PE2 Specifications

General

Brand	Yealink
Model	T21PE2
Category	IP Phone
Language	English