Yealink SIP-T19 E2 T4 Series, Administrator'S Manual

Page: 23 / 981

Product Overview
1
Product Overview
This chapter contains the following information about IP phones:

SIP IP Phone Models

Expansion Modules
SIP IP Phone Models
This section introduces SIP-T54S, SIP-T52S, SIP-T48G/S, SIP-T46G/S, SIP-T42G/S, SIP-T41P/S,
SIP-T40P/G, SIP-T29G, SIP-T27P/G, SIP-T23P/G, SIP-T21(P) E2 and SIP-T19(P) E2 IP phone
models. These IP phones are endpoints in the overall network topology, which are designed to
interoperate with other compatible equipments including application servers, media servers,
internet-working gateways, voice bridges, and other endpoints. These IP phones are
characterized by a large number of functions, which simplify business communication with a
high standard of security and can work seamlessly with a large number of SIP PBXs.
These IP phones provide a powerful and flexible IP communication solution for Ethernet TCP/IP
networks, delivering excellent voice quality. The high-resolution graphic display supplies
content in multiple languages for system status, call log and directory access. IP phones also
support advanced functionalities, including LDAP, Busy Lamp Field, Sever Redundancy and
Network Conference.
IP phones comply with the SIP standard ( RFC 3261 ), and they can only be used within a network
that supports this model of phone.
Expansion Modules
This section introduces EXP20, EXP40 and EXP50 expansion modules. The expansion modules
are consoles you can connect to Yealink IP phones to add DSS keys, which can be used to assign
predefined functionalities for quickly accessing features. If you want to configure the expansion
module keys, you have to connect the expansion module(s) to the IP phone in advance.
The following table lists the supported IP phone models for these expansion modules:
Expansion Module Phone Model
EXP20 SIP-T29G/T27P/T27G
EXP40 SIP-T48G/T48S/T46G/T46S
EXP50 SIP-T54S/T52S
Expansion modules enable you to handle large volume of calls on a regular basis and expand