Yealink SIP-T48U Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
423
Permitted
Values
String within 32 characters
Default
Blank
Web UI
Account > Advanced > Group Call Pickup Code
[1]
X is the account ID. For T57W/T54W/T48U/T48S/T48G/T46U/T46S/T46G/T29G, X=1-16; for
T53W/T53/T43U/T42G/T42U/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.
Dialog Info Call Pickup
While some SIP servers implement directed call pickup using a directed call pickup code, others also support imple-
ment this feature through SIP signals.
Note: In this way, you do not need to configure the directed call pickup code.
If you enable the phone to implement directed call pickup through SIP signals, the phone picks up an incoming call
via a SIP INVITE message with a Replaces header. The value of Replaces is derived from a NOTIFY message with
the dialog-info event. This feature applies only to directed call pick-up attempts initiated against monitored BLF
resources. It means you can pick up an incoming call by pressing a BLF/BLF List key. It is not applicable to T19(P)
E2/CP920 phones.
Example of the dialog-info carried in NOTIFY message:
<?xml version="1.0"? >
<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="6" state="partial" entity-
y="sip:1011@10.2.1.48:5060" >
<dialog id="65603" call-id="0_1756536024@10.10.20.34" local-tag=" 3408640225" remote-tag-
g=" 3779921438" direction="recipient" >
<state > early</state>
<local >
<identity > sip:1011@10.2.1.48:5060</identity>
<target uri="sip:1011@10.2.1.48:5060"/>
</local >
<remote >
<identity > sip:1058@10.2.1.48:5060</identity >
<target uri="sip:1058@10.2.1.48:5060"/ >
</remote>
</dialog>
</dialog-info>
Example of the Replaces carried in INVITE message:
Via: SIP/2.0/UDP 10.10.20.18:5060;branch=z9hG4bK2026058891
From: "1010" <sip:1010@10.2.1.48:5060>;tag=826048502
To: <sip:1058@10.2.1.48:5060>
Call-ID: 0_572446084@10.10.20.18

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