Administration HiPath 3000/5000 V7 IP systems

3000sb1.fm
For internal use only Introduction
Features
ternally. HiPath 3000/5000 uses this information to send packets to an ITSP or called party
in the Internet to ensure that even HiPath 3000/5000 systems behind a NAT device can be
reached from the Internet. The settings for an upstream NAT firewall or a NAT router do not
have to be changed for this.
Note: A signaling gateway can perform STUN requests on behalf of media gateways. The
mechanism that sends IP packages on behalf of other devices is known as "IP Spoofing".
By deliberately using special filters, some network infrastructure components can check
the assignment of incoming packets and take the necessary action if the assignment is incorrect,
for example, trigger an alarm (e-mail), reject the packet or even block the port (for
example, by SNMP access to switches).
Network administrators must configure exceptions so that the STUN protocol can be used
for NAT traversal even in such an environment.
ITSP features
● Special number/emergency calls/fax and modem calls
– Emergency numbers (110, 112) are not fully supported by ITSPs because the local
network cannot be uniquely assigned during breakout into the public network. These
connections must be set up over S 0 accesses.
– Special number are not transferred by all ITSPs.
We recommend transferring the following special numbers by default over ISDN:
0137 Televoting
0138 Televoting
0900 Premium-rate services
118xy Information services
116 116 Emergency cancellation number for EC cards, credit cards, etc.
● LCR must be adapted by the service team to fulfill requirements for routing trunk calls to
selected service providers/services (for example, 0180, 0800, etc.).
> If a system is only operated over an Internet telephony connection, routing can also
be configured in the ITSP direction for emergency calls and special numbers. You
must first ensure that the ITSP supports these services.
● Bandwidth control
All connections to the Internet telephony service provider (ITSP) use HiPath 3000/5000
DSP resources, as do connections with an analog/IP gateway (for example, ISDN connections)
or when using music on hold. Please refer to the notes in this manual in Section 2.1,
"System-Related Capacity Limits" and in the service manual under Dynamic configuration
rules.
P31003-H3570-Y100-4-7618, 2007-10-31
HiPath 3000/5000 V7, System Description 1-17