Modem Via Ip; Hipath Feature Access (Hfa) - Siemens HiPath 3000 Series Service Documentation

h3h5_in_the_lan.fm
HiPath 3000/5000 in the LAN Network
HG 1500 Board
13.6.6

Modem via IP

As for the encapsulation of voice transmission on IP routes, the HG 1500 can also route analog
data between modems over an IP connection.
This function enables connections to be made between traditional analog modems in IP net-
works. The HG 1500 board supports different functions for transferring the information:
Modem over G.711 Voice Codec (recommended)
Like faxes, modems can be used to switch a transparent connection over two networked sys-
tems with the G.711 voice codec.
Special limits in terms of delay, jitter, and packet loss network parameters must be taken into
account for the IP network. This function does not support compressed transmission (G.723).
The transport and security protocols that can be used depend on the modems in operation and
not on the HG 1500
V.90 Standard
The V.90 Standard (56K) is supported in the "modem over G.711" procedure. Please note,
however, that an approximate speed of 56 Kbps is only reached in the downstream direction
Bit Rate Adaptation V.110
The HG 1500 supports V.110 bit rate adaptation to guarantee remote access with GSM termi-
nals using asynchronous PPP. However, this only supports the conversion of GSM-specific
data transmission speed of 9600 bps into the ISDN bit stream of 64 Kbps.
13.6.7

HiPath Feature Access (HFA)

HiPath Feature Access (HFA) provides telephones and clients connected via IP with all the
functions that can also be used by TDM telephones in HiPath networks. For this purpose, Cor-
Net TS protocol – with which the terminals are addressed – is tunneled over IP.
In connection with a HG 1500, IP telephones/clients are then equivalent to the classic TDM
telephones on a HiPath system.
13-28
Nur für den internen Gebrauch
A31003-H3590-S100-7-7620, 06/2012
HiPath 3000/5000 V9, Service documentation