Installation guide

44 Planning and Installation Guide ShoreTel 14.2
Network Requirements and Preparation
3
Frame Relay ....................................................................................................... 53
SDSL .................................................................................................................. 53
IDSL.................................................................................................................... 53
ADSL .................................................................................................................. 53
Cable Modems ................................................................................................... 53
ISDN BRI ............................................................................................................ 53
Dial-Up Modems................................................................................................. 53
IP Address Assignment............................................................................................. 54
Configuring DHCP for ShoreTel IP Phones............................................................... 55
Configuring Automatic VLAN Assignment through DHCP ........................................ 58
Time Services............................................................................................................ 59
Virtual Private Network (VPN)................................................................................... 59
Tunneling ............................................................................................................ 60
Performance ....................................................................................................... 61
Integrated Security Appliances........................................................................... 61
Firewalls.................................................................................................................... 62
Media Encryption ...................................................................................................... 63
Security for ShoreTel 400-Series IP Phones............................................................. 63
Session Initiation Protocol (SIP)................................................................................ 64
Example Network Topologies.................................................................................... 65
Single-Site Implementation................................................................................. 65
Multisite Implementation..................................................................................... 65
Computing Admission Control Bandwidth................................................................. 66
WAN Bandwidth per Call (Full Duplex) without cRTP......................................... 67
WAN Bandwidth per Call (Full Duplex) with cRTP.............................................. 68
Setting Admission Control .................................................................................. 70