Yealink SIP-T21P User Manual

Advanced Phone Features
109
To configure MoH server via web user interface:
1. Click on Account.
2. Select the desired account from the pull-down list of Account.
3. Click on Advanced.
4. Enter the SIP URI (e.g., sip:moh@sip.com) in the Music Server URI field.
5. Click Confirm to accept the change.
When you have placed a call on hold, the held party can hear the music.
Note
ACD is often used in offices for customer service, such as call center. The ACD system
handles large volumes of incoming calls from callers who have no need to talk to a
specific person but who require assistance from any of multiple persons at the earliest
opportunity. ACD on the SIP-T21P IP phone allows the ACD system to distribute large
volumes of incoming calls to the registered ACD users. To use this feature, you should
configure an ACD key in advance.
Note
All involved parties cannot use encrypted RTP (SRTP).
MoH server is configurable via web user interface only.
Make sure ACD is enabled on your IP phone. For more information on enabling ACD,
contact your system administrator.

Yealink SIP-T21P Specifications

General

Display	132 x 64-pixel graphical LCD
Network	10/100 Mbps Ethernet
SIP Accounts	2
Wall Mountable	Yes
Audio Features	HD Voice
Protocols	SIP v1 (RFC2543), v2 (RFC3261)
Voice Codecs	G.711(A/μ), G.729AB, G.726, G.722
Phonebook	1000 entries
Call Features	Call hold, call waiting, call transfer, call forward, 3-way conferencing
Security	SRTP, TLS, 802.1x, HTTPS
Ethernet Ports	2 x RJ45 10/100 Mbps
Power Supply	Power over Ethernet (PoE) or optional power adapter
Operating Humidity	10% to 90% (non-condensing)
Languages	Supports multiple languages
PoE	Yes (802.3af)
Operating Temperature	-10°C to 50°C