ZyXEL P-2701RL User Guide - Page 22
Table 4, Advanced SIP Settings part 3, SIP Setting
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Chapter 3 Phone Use and Configuration Figure 7 Advanced SIP Settings (part 3) The following table describes the labels in this screen. Table 4 SIP Setting LABEL DESCRIPTION Session Timer Enable Select Enable if you want to define how long the ZyXEL Device waits to receive a session-alive packet for a voice session from the SIP server. Minimum Expiration Time Enter the minimum time the ZyXEL Device waits for a session-alive packet (90-65536 seconds). If a session-alive packet is not received during this time, the voice session is terminated. Maximum Expiration Time Enter the maximum time the ZyXEL Device waits for a session-alive packet (90-65536 seconds). If a session-alive packet is not received during this time, the voice session is terminated. Dial Plan Active Select Active to enable the dial plan feature. A dial plan is used by a service provider to define the expected rules and digit patterns for the telephone numbers it uses. If your dial plan does not match the service provider's, you probably will not be able to connect to their servers. 22 P-27XX Series User's Guide