Yealink T21PE2 User Manual

Appendix
543
l RFC 5954—Essential Correction for IPv6 ABNF and URI Comparison in RFC 3261
l RFC 6026—Correct Transaction Handling for 2xx Responses to SIP INVITE Requests
l RFC 6141—Re-INVITE and Target-Refresh Request Handling in SIP
l draft-ietf-sip-cc-transfer-05.txt—SIP Call Control - Transfer
l draft-anil-sipping-bla-02.txt—Implementing Bridged Line Appearances (BLA) Using Session Initiation Protocol (SIP)
l draft-anil-sipping-bla-03.txt—Implementing Bridged Line Appearances (BLA) Using Session Initiation Protocol (SIP)
l draft-ietf-sip-privacy-00.txt—SIP Extensions for Caller Identity and Privacy, November
l draft-ietf-sip-privacy-04.txt—SIP Extensions for Network-Asserted Caller Identity and Privacy within Trusted Net-
works
l draft-levy -sip-diversion-08.txt—Diversion Indication in SIP
l draft-ietf-sipping-cc-conferencing-03.txt—SIP Call Control - Conferencing for User Agents
l draft-ietf-sipping-cc-conferencing-05.txt—Connection Reuse in the Session Initiation Protocol (SIP)
l draft-ietf-sipping-rtcp-summary-02.txt—Session Initiation Protocol Package for Voice Quality Reporting Event
l draft-ietf-sip-connect-reuse-06.txt—Connection Reuse in the Session Initiation Protocol (SIP)
l draft-ietf-bliss-shared-appearances-15.txt—Shared Appearances of a Session Initiation Protocol (SIP) Address of
Record (AOR)
To find the applicable Request for Comments (RFC) document, go to http://www.ietf.org/rfc.html and enter the RFC
number.
Reading Icons
T54S/T-
52S
T48S T48G T46S T46G
T42S/T-
41S
T42G/T-
41P
T40P-
/G
T29G
T27-
G
CP9-
20
T23P/T23G-
/T21(P) E2
T19
(P)
E2
Description
Wired net-
work is
unavailable
/ / / / /
Wired net-
work is
unreachable
Private line
registers suc-
cessfully
Registration
failed
(Flash-
ing)
(Flash-
ing)
Registering
/ / / / / / / / / / / /
Yealink
Cloud
account
registers suc-
cessfully
Hands-free
(speak-
erphone)
mode

Yealink T21PE2 Specifications

General

Brand	Yealink
Model	T21PE2
Category	IP Phone
Language	English