User Manual
Table Of Contents
- Chapter 1 Introduction
- Chapter 2 Preparations & Installation
- Chapter 3 Network Service Configurations
- Chapter 4 VoIP Telephone Adapter Configurations
- Chapter 5 Netowrk
- Chapter 6 NAT Trans
- Chapter 7 SIP Setting
- Chapter 8 Advance Setting
- Chapter 9 Other Setting
- Appendix A Voice Communication Samples
- Case 1: ATA to ATA connection via IP address
- Case 2: (Peer-to-Peer mode) VIP-157S Port 1 to Port 2 communications
- Case 3: Call Forward Feature_Example 1
- Case 4: Call Forward Feature_Example 2
- Case 5: Call Forward Feature_Example 3
- Case 6: Call Forward Feature_Example 4
- Case 7: Auto Answer Feature_IP to PSTN
- Case 8: Auto Answer Feature_PSTN to IP
- Appendix B The method of operation guide
- Appendix C VIP-156/VIP-156PE/VIP-157/VIP-157S Specifications

Field Description
SIP Expire Time
To setup the registration interval time.
SIP Expire Time
Type
Default is G eneral; Register interval time setting. Provide items
General (standard), 1/2, 2/3, 3/4, 4/5, 5/6, 6/7, 7/8, 8/9, 9/10。
LNote: register server need support this function.
Register time calculated
General: expire time-[(expire time/30)*6], when Expire Time>60 it will
start to work, if less then 60 seconds, it will decrease 5 seconds.
1/2: expire time * 1/2.
2/3: expire time * 2/3.
3/4: expire time * 3/4.
4/5: expire time * 4/5.
5/6: expire time * 5/6.
6/7: expire time * 6/7.
7/8: expire time * 7/8.
8/9: expire time * 8/9.
9/10: expire time * 9/10.
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