ZyXEL ISG50-PSTN User Guide - Page 433

Chapter 27 Global PBX Settings Table 141 Configuration > PBX > Global > SIP Server (continued) LABEL Enable Personal AA DESCRIPTION Select From external call to enable the ISG50's auto-attendant feature for calls received from outside the PBX-managed telephone system. Enable Session Timer Minimum Session Expiration Session Expires Select From internal call to enable the ISG50's auto-attendant feature for calls received from within the PBX-managed telephone system. Select this to enable the session timer. Enter the minimum time in seconds before an idle SIP connection expires. You can enter a value between 90 and 1800. Enter the duration in seconds before an idle SIP connection expires. You can enter a value between 90 and 86400. Enable RTCP Support Enable DNS SRV Apply Reset The value entered in this field must be greater than or equal to the value entered in the Minimum SE field. Select this to have the ISG50 use RTCP (RTP Control Protocol) as an optional signalling protocol for SIP traffic. Select this to have the ISG50 query your ISP's DNS server for a list of any available SIP servers that it maintains. This is useful if your static SIP server experiences difficulties, making it hard for your IP phone users to make SIP calls. Doing this, however, could impact the ISG50's performance. Click this to save your changes. Click this to set every field in this screen to its last-saved value. 27.3 The Feature Code Screen Use this screen to set values for the feature codes the ISG50 supports from an IP phone's extension. Users can dial these codes to enable or disable the features listed below for their extension settings by entering these codes on their phone's keypad. Click Configuration > PBX > Global > Feature Code to open the screen as shown. Figure 279 Configuration > PBX > Global > Feature Code ISG50 User's Guide 433