User manual

8820IP Phone User Manual_ SIP (V1.44)
26
● use service: Enable/disable service by checking/clearing this box. To
make calls through SIP Proxy Server, please check this box; otherwise,
phone can only make IP-to IP calls.
● register ttl : IP phone will send a keep-alive registration message to SIP
proxy server every “register ttl” seconds. The minimum value is 10,
maximum value is 65535. Default is 60.
● service type: This option is used to accommodate the miscellaneous
requirements of the system providers.
§ Common: no special requirements
§ Huawei: Use Huawei’s system
§ zte: Use ZTE’s SIP system
§ harbour: Use Harbour’s system
§ utstarcom: Use UtstarCom’s SIP system
§ uptech: Use Uptech’s system
§ keimen: Use Keimen’s system
§ mediaring: Use Mediaring’s SIP system
§ italkbb: Use ItalkBB’s SIP system