Specifications

310HD, 320HD and 420HD IP Phones
22.10 Configuring Busy Lamp Field
Busy Lamp Field (BLF) can be configured using the Web or Configuration File, as
described below.
Note: BLF is only applicable to the 320HD IP Phone.
 To configure BLF:
 Using the Web:
1. Access the ‘Services’ page (Configuration tab > Voice Over IP menu >
Services).
Figure 22-8: BLF Support Web Fields
2. Configure the BLF parameters according to the table below, and then click
Submit.
 Using the Configuration file:
Table 22-9: BLF Parameters
Parameter Description
Activate
[voip/services/busy_lamp_field/enabled]
Enables the BLF feature:
 [0] Disable
 [1] Enable (default)
BLF Subscription Period
[voip/services/busy_lamp_field/subscripti
on_period]
The interval between BLF and SIP SUBSCRIBE
messages.
The valid range is 0 to 86400. The default value is
3600.
User Resource List
[voip/services/busy_lamp_field/uri]
The user resource list. This must be the username
(not the domain name). For example, if the URI
resource list is [e-mail], then only the
value mylist must be entered.
The valid value is up to 64 characters.
Note: This parameter is applicable only if the
parameter
voip/services/application_server_type is set to
BSFT.
Administrator's Manual 146 Document #: LTRT-09910