Calculation Example 7: Virtual Private Network Vpn With Customer; Specifications: 1000 Kbps Bandwidth For Data Transfer, Remaining - Siemens HiPath 5000 Service Manual
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2.6.8.1.7
Calculation Example 7: Virtual Private Network VPN with Customer
Specifications: 1000 Kbps Bandwidth for Data Transfer, Remaining Bandwidth for Voice
Transmission
The 2 Mbps SDSL connection of an HXGM3 board (HiPath 3750 or HiPath 3700) is to enable
duplex data transmission at 1000 Kbps. The average packet size is 500 bytes. In addition, the
SDSL connection for IP Networking connections with G.729 and a sample rate of 20ms should
be used.
Performance Requirements for SDSL Connection
Calculation of the dynamic performance requirement for the SDSL connection based on the re-
quired data exchange rate ( 1000kbps = (1000 x 1000)/8 bps = 125000 bps per route). The fol-
lowing formula applies for 500 byte packet length:
125000 bps
500 bytes/packet
Data transfer (addi-
tional feature: En-
hanced B Channels
Disabled over WBM.)
Number of possible simultaneous IP networking connections
A performance requirement of 595 points is specified for the SDSL connection. Since the
HXGM3 board can provide total performance of 980 points, 385 performance points are avail-
able for IP networking connections.
Signaling without
H.235 security (inde-
pendent of the WBM
setting "Enhanced B
Channels")
P31003-H3560-S403-54-7620, 09/05
HiPath 3000 V6.0, HiPath 5000 V6.0, Provisional Service Manual
= 250 packets/route = 500 packets/s for both routes
Function
SDSL connection (with AES encryption and 500 bytes packet length,
resource requirement (score) = 119 for 100 packets/sec):
500 packets/sec
Function
IP Networking Channel (25 calls per hour)
System Data
Dynamic Configuration Rules
Resource require-
ment
(credit point)
500 x (119 / 100) =
595.0
Total =
595.0
Resource require-
ment
(credit point)
3.2
sysdat.fm
2-43
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