Siemens HiPath 3000 Series - Standalone System with Home Offices Connected Via VPN

sysdat.fm
A31003-H3590-S100-7-7620, 06/2012
HiPath 3000/5000 V9, Service documentation
2-73
Nur für den internen Gebrauch System Data
Dynamic Configuration Rules
Calculation for each individual branch office (HiPath 3500/3550):
4 gateway channels via LAN2 with AES encryption, and 8 gateway channels from HFA tele-
phones to the local ISDN CO (via LAN1) must be calculated. The signaling load must also be
taken into account.
With a permissible maximum points total of 780, this scenario is feasible for the branch offices.
2.5.4.2.5 Standalone System with Home Offices connected via VPN
8 home offices are to be connected to a HiPath 3800 system. Teleworkers use G.723 with a
sample rate of 30 ms. Data can also be transferred at 512 Kbps in both directions via a 1-Mbps
SDSL connection. The average packet length is 500 bytes. VPN should be used with AES en-
cryption. This configuration requires 1 STMI2 (2 DSPs on board for 32 channels).
Figure 2-12 VPN Voice and Data, Home Office Connection
Performance calculation:
G.723 is generally configured for home offices. As VPN is required for the DSL connection, the
option “Enhanced B Channels” must be deactivated. The HFA terminal point signaling load
must also be taken into account.
Table 2-52 Calculation for Each Individual Branch Office (HiPath 3500/3550):
Function Formula Points
Signaling: IP phones (without H.235) 30 · 0.68 20
Signaling: PBX networking channels (without H.235) 4 · 3.2 13
Gateway channels: payload (G.711/20ms) 8
· 39 312
Voice channels: G.711 with VPN and AES 4
· 89 356
Total 701
HiPath 3800
LAN 2
LAN 1
Head Office
ISDN
512 kbit/s Data
Internet
4 Voice Channels
AES Encryption
Codec G.723 (30ms)
SDSL
1 Mbit/s
Encrypted Intranet Traffic
(Voice/Data) via VPN Tunnel
8 x VPN Clients
Safenet Sentinel
OpenScape Personal Edition