Yealink SIP-T48U Administrator's Guide

Advanced Features
458
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.
Line Key Configuration Programmable Key Configuration
linekey.X.type = 14
linekey.X.line = 1
linekey.X.value = 4603
linekey.X.label = Bill
programablekey.X.type = 14
programablekey.X.line = 1
programablekey.X.value = 4603
After provisioning, an Intercom key for Bill (4603) is available on the phone. You can press the Intercom key to
place an intercom call to Bill (4603).
If you want to use the Intercom key to pick up a call, you need to enable the Intercom key to monitor state changes,
and configure the pickup code for the Intercom key, for example, set “linekey.X.extension = *97” or “pro-
gramablekey.X.extension = *97“. When the monitored user Bill (4603) receives an incoming call, you can press the
Intercom key to pick up the call to Bill (4603) directly.
Note: You cannot use a programmable key to monitor an intercom contact for state changes, but press it to pick up a call.
Related Topics
Line Keys Configuration
Programmable Keys Configuration
State Monitor for Intercom Contact
State Monitor for Intercom Contact
You can make the phone to monitor a specific intercom user for state changes (busy or idle). When the monitored
user receives an incoming call, the supervisor can press the intercom key to pick up the call directly. The phones
support this feature using a SUBSCRIBE/NOTIFY mechanism as specified in RFC 3265. It is not available on the All
phones except T19(P) E2 phones.
Note: If you want to use the Intercom key to pick up a call, you need to configure the pickup code for the Intercom key, for
example, “linekey.X.extension = *97”.
Topics
State Indicator of Intercom Contact
State Monitor for Intercom Contact Configuration
State Indicator of Intercom Contact
The following table shows the LED indicator associated with the Intercom key:
LED Status
Description
Solid green The monitored user is idle.

Yealink SIP-T48U Specifications

General

Handset type	Wired handset
Product type	IP Phone
Product color	Gray
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
Expansion module support	Yes
Ethernet LAN (RJ-45) ports	2
Display diagonal	7 \
Display resolution	800 x 480 pixels
Lines quantity	- lines
Phonebook capacity	1000 entries
Number of VoIP accounts	16
Voice codecs	AGC, AJB, AMR-WB, CNG, G.711, G.722, G.723.1, G.726, G.729ab, VAD, iLBC
Security algorithms	AES, HTTPS, SRTP, TLS
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet LAN interface type	Gigabit Ethernet
Front camera	-
AC adapter input voltage	100 - 240 V
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Keypad number of keys	29
Number of handles included	1 pc(s)
Harmonized System (HS) code	85171800

Weight and Dimensions

Width	226 mm
Height	185 mm