Technical data

Capacities and Limitations

EN4442EN00EN_0001

Siemens

3 Capacities and Limitations

● The HiPath HG 3500 line gateway has the capacity to convert 60/120 connections into Fast

Ethernet packets and provide TDM to IP conversion for 60/120 concurrent calls.

● The HG 3500 line gateway is only supported in the HiPath 4000 V4 communication

platforms.

● The HG 3500 line gateway is supported in all IP distributed Access Points including AP

3500/3505 APs that were part of an upgraded v1.0 system.

● The HG 3500 supports only phoneadapters that do not require their own B-channel. The

following adapters are not supported: phone-adapter, a/b-Adapter, S0-adapter and V.24-

Adapter.

● Autoset Relocate, Teleworking V2.6 and Workstation Protocol are not supported with

HiPath HG 3500.

● With HiPath HG 3500, payload switching between the IP clients is supported. That means

that the HiPath 4000 switching matrix is not involved in the payload connection and all calls

between two IP phones are switched in the IP network (see Section 2.5.6, “DMC

Considerations” for more details).

● HiPath HG 3500 line gateways do not operate in a load-sharing mode - there is a fixed

assignment of the IP phones to one HiPath HG 3500 gateway.

● HiPath HG 3500 gateways can be configured as a standby gateways providing backup

capabilities in case of gateway failure (see Section 6.15.2.2, “Standby Gateways” for more

details).

● ‘Oversubscription’ is possible, meaning that more IP phones per gateway can be

configured than there are available connections (maximum of 240 subscribers).

● The HG 3500 integrated gateway does not interoperate with 3

party (e.g. H.323/H.450 or

SIP compatible) IP phones/clients.

● The HG 3500 integrated gateway requires a static IP address.

● All IP phones do support DHCP and are supported in DHCP mode via the HG 3500

gateway. Note that a DHCP server has to be configured in the IP network; otherwise static

IP addresses are required for all clients.

● The connection of analog devices via a HiPath AP 1120 analog gateway is supported. For

more details please refer to the E-Doku pages in the intranet (http://

netinfo2db.icn.siemens.de:8080/edoku/jsp/search.jsp?uc=search&string=1120).

● NTP (Network Time Protocol) is not supported on the HG 3500 because there is no real-

time clock chip on the gateway card.

● Full user mobility is supported within a single system and networked systems.