2.5.3 Thumb Rule for HG 1500 V3.0

2.5.3	Thumb Rule for HG 1500 V3.0

2.5.3.1

Procedural Principles

The thumb rule presented below for calculating the dynamic load for the HG 1500 board is based on the principle of considering every functionality (HFA phone, IP trunking, gateway channels, VPN tunnel, etc.) in terms of its CPU load.

2.5.3.2

Maximum Permissible Values for HG 1500 V3.0

For version V3.0, the following maximum permissible point totals are used as a basis for the thumb rule:

Table 2-41

HG 1500 V3.0 Boards and Corresponding Maximum Points

HG 1500 Board

Corresponding Systems

Maximum
Points

HiPath 3300/3350/3500/3550

780

STMI2

HiPath 3800

980

2.5.3.3

Current Thumb Rule Values

The following table lists the interfaces taken into account in the thumb rule.

PDM Modules

Table 2-42

Points for the PDM Modules to Increase the DSP Number

System Interface

Meaning

Weight

PDM1

Number of PDM1 modules on the board

10

Signaling

Table 2-43

Points for Signaling

System Interface

Meaning

Weight

IP phones
without H.235

Number of terminal devices connected via IP using HFA functionality or SIP (GK security is deactivated).

0.68 · FTln

IP phones
with H.235

Number of terminal devices connected via IP using HFA functionality (full or reduced GK security is activated).

0.78 · FTln

PBX networking channel without H.235

Number of digital B channels (networking trunk) to other nodes or to Xpressions via IP (GK security is deactivated).

3.2 · FTln

PBX networking channel with H.235

Number of digital B channels (networking trunk) to other nodes or to Xpressions via IP (reduced or full GK security is activated).

4.0 · FLtg

ITSP lines without H.235

Possible number of simultaneous voice channels to the ITSPs

3.2 · FLtg

ITSP lines with H.235

Possible number of simultaneous voice channels to the ITSPs

4.0 · FLtg

Gateway Channels (DSP - LAN)

The following table indicates the HG 1500 gateway channel load (DSP

LAN) required for connections between TDM and IP, e.g., for calls between CO and IP phones. The size of the HG 1500 load depends on various features (for example, "Enhanced B Channels", VPN functionality) and on the voice codec used (G.711, G.729, G.723).

Table 2-44

Points for Gateway Channels (When Using G.711 or G.729)

System Interface

Meaning

Weight

Gateway channels
with enhanced B channel

Number of gateway channels (DSP

LAN) if the feature "Enhanced B Channels" is activated in the WBM, that is, firewall and VPN functionality may not be used.

11

Gateway channels
without VPN

Number of gateway channels (DSP

LAN) if VPN functionality is not used.

39

Gateway channels
with VPN and AES

Number of gateway channels (DSP

LAN) if VPN and AES encryption are used.

89

Gateway channels
with VPN and 3DES

Number of gateway channels (DSP

LAN) if VPN and 3DES are used.

104

Gateway channels
with enhanced B channel
(G.723 only)

Number of gateway channels (DSP

LAN) if only the voice codec G.723 is used and the feature "Enhanced B Channels" is activated in the WBM.

7.5

Gateway channels
without VPN
(G.723 only)

Number of gateway channels (DSP

LAN) if only the voice codec G.723 and no VPN functionality is used.

26

Gateway channels
with VPN and AES
(G.723 only)

Number of gateway channels (DSP

LAN) if only the voice codec G.723 and VPN with AES encryption are used.

60

Gateway channels
with VPN and 3DES
(G.723 only)

Number of gateway channels (DSP

LAN) if only the voice codec G.723, VPN and 3DES are used.

70

Voice Channels (LAN1 - LAN2)

The following table indicates the HG 1500 voice channel load (LAN1

LAN2) when voice packets are routed via the HG 1500, e.g., for calls between IP phones in two different systems networked via a VPN tunnel. The size of the HG 1500 load depends on the encryption algorithm (AES or 3DES) and on the voice codec used (G.711, G.729, G.723).

Table 2-45

Points for Voice Channels (When Using G.711 or G.729)

System Interface

Meaning

Weight

Voice channels
without VPN

Number of voice channels (LAN1

LAN2) if encryption is not used.

73

Voice channels
with VPN and AES

Number of voice channels (LAN1

LAN2) if VPN and AES encryption are used.

89

Voice channels
with VPN and 3DES

Number of voice channels (LAN1

LAN2) if VPN and 3DES encryption are used.

104

Voice channels
without VPN
(G.723 only)

Number of voice channels (LAN1

LAN2) if only the voice codec G.723 and no encryption is used.

49

Voice channels
with VPN and AES
(G.723 only)

Number of voice channels (LAN1

LAN2) if only the voice codec G.723 and VPN with AES encryption is used.

60

Voice channels
with VPN and 3DES
(G.723 only)

Number of voice channels (LAN1

LAN2) if only the voice codec G.723 and VPN with 3DES encryption is used.

70

Data (LAN)

The following table indicates the HG 1500 data routing load (LAN1

LAN2), e.g., for a DSL connection to the Internet or a data connection for two locations via VPN. The size of the HG 1500 load depends on the encryption algorithm used (AES or 3DES), and on the packet rate and average packet size.

Table 2-46

Points for Data Routing

System Interface

Meaning

Weight

Data without VPN
100 bytes

Number of packets per second if the average packet size is 100 bytes and encryption is not used.

0.72

Data with AES
100 bytes

Number of packets per second if the average packet size is 100 bytes and VPN with AES encryption is used.

0.84

Data with 3DES
100 bytes

Number of packets per second if the average packet size is 100 bytes and VPN with 3DES encryption is used.

0.93

Data without VPN
500 bytes

Number of packets per second if the average packet size is 500 bytes and encryption is not used.

0.79

Data with AES
500 bytes

Number of packets per second if the average packet size is 500 bytes and VPN with AES encryption is used.

1.19

Data with 3DES
500 bytes

Number of packets per second if the average packet size is 500 bytes and VPN with 3DES encryption is used.

1.66

Data without VPN
1400 bytes

Number of packets per second if the average packet size is 1400 bytes and encryption is not used.

0.96

Data with AES
1400 bytes

Number of packets per second if the average packet size is 1400 bytes and VPN with AES encryption is used.

1.98

Data with 3DES
1400 bytes

Number of packets per second if the average packet size is 1400 bytes and VPN with 3DES encryption is used.

3.29

PPP Channels

Table 2-47

Points for PPP Channels

System Interface

Meaning

Weight

Voice channels
(G.729 - 1)

Number of voice channels with G.729 and a packet assembly of 1 (20ms) that are routed with PPP via ISDN.

150

Voice channels
(G.729 - 3)

Number of voice channels with G.729 and a packet assembly of 3 (60ms) that are routed with PPP via ISDN.

54

Voice channels
(G.723 - 1)

Number of voice channels with G.723 and a packet assembly of 1 (20ms) that are routed with PPP via ISDN.

100

Voice channels
(G.723 - 2)

Number of voice channels with G.723 and a packet assembly of 2 (60ms) that are routed with PPP via ISDN.

57

PPP data channels

Number of channels via which data is routed with PPP

55

HiPath 3000/5000 V9, Service Documentation, Issue 10		up

Disclaimer & Copyright	ID: P31003H3590S100017620	2014-02-27