Wistec BT-323-EE, Руководство пользователя

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IP Phone User Manual (V1.32)
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requirement, just remain it as default value 0.0.0.0.
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use service: Enable/disable service by checking/unchecking this box.
Different service responses different protocol as follows:
With H323 protocol used, the protocol service refers to the gatekeeper
searching the address. To let IP phone call each other by E.164
number, please check this box and then fill the IP address or domain
name of corresponding gatekeeper into service addr field. Without this
check box being selected, the phone can call by gateway or just by
dialing IP address of other IP phone or H323 device (such as
Netmeeting) at the same network segment.
With MGCP protocol used, the protocol service refers to Call Agent.
Please check this box according to system, and then fill service addr
field with Call Agent IP address or domain name.
With SIP protocol used, the protocol service refers to SIP Proxy Server.
Check this box according to system, and then fill service addr field with
SIP Proxy Server IP address or domain name.
With Net2phone protocol used, the protocol service refers to
designated server. Please check this box, and then fill the designated
IP address or domain name into service addr field.