Yealink SIP-T19 E2 — руководство администратора по IP-телефонии и резервированию серверов [550/841]

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series IP Phones

534

The browser will display an image showing the phone’s current screen. You

can save the image to your local system.

- Else, the browser will display an image showing the phone’s current screen

directly. You can save the image to your local system.

Note

Server redundancy is often required in VoIP deployments to ensure continuity of phone

service, for events where the server needs to be taken offline for maintenance, the

server fails, or the connection between the IP phone and the server fails.

Two types of redundancy are possible. In some cases, a combination of the two may be

deployed:

 Failover: In this mode, the full phone system functionality is preserved by having a

second equivalent capability call server take over from the one that has gone

down/off-line. This mode of operation should be done using the DNS mechanism

from the primary to the secondary server.

 Fallback: In this mode, a second less featured call server with SIP capability takes

over call control to provide basic calling capability, but without some advanced

features (for example, shared line, call recording and MWI) offered by the working

server. IP phones support configuration of two servers per SIP registration for

fallback purpose.

Frequent capture may affect the phone performance. Yealink recommend you to capture

the phone screen display within a minimum interval of 4 seconds.