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 2-21   HG 1500 V3.0 Boards and Corresponding Maximum Points
 HG 1500 Board  
 Corresponding Systems  
 Maximum
Points  
 HXGS3, HXGR3  
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 2-22   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 2-23   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 2-24   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 2-25   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 2-26   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 2-27   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  

VCAPI Channels  

 Table 2-28   Points for VCAPI Channels
 System
Interface  
 Meaning  
 Weight  
 VCAPI fax  
Number of VCAPI channels (not the number of clients) used for fax purposes  
 11  
 VCAPI data  
Number of VCAPI channels (not the number of clients) used for data transfer  
 34  

HiPath 3000/5000 V8, Service Documentation, Issue 10   up Top
Disclaimer & Copyright   ID: P31003H3580S100017620   2011-01-24