Specifications

Network Configuration Specifics
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Q: What QoS settings are used for T.38 packets and signalling?
A: T.38 packets are transmitted using the same QoS settings as voice. QoS for T.38 cannot be
programmed independently of voice QoS settings, T.38 and E2T (Voice) traffic share the same
global variable for the QoS setting.
Q: How does the 'loopback' method used to allow T.38 to interoperate with NuPoint work?
A: Because NuPoint does not support T.38 natively a 3300 ICP needs to act as a Fax gateway
in front of the NuPoint server. The 3300 ICP will terminate the T.38 call and then forward the
Fax call to NuPoint as a G.711 pass though call.
For the 3300 ICP to act as a Fax gateway for NuPoint it is necessary to have a dual T1/E1 card
installed in the 3300 ICP. A loopback cable is then used to connect the two ports of the T1/E1
card together. Using ARS, with digit insertion and removal, the G.711 Fax pass through call is
directed out one port of the T1 card, then the call is received on the other T1 port via the loopback
cable. The 3300 ICP will then forward the fax call to NuPoint over an IP link as a G.711 pass
through call.
For details on how to use a 3300 ICP as a Fax gateway for NuPoint, please refer to the NuPoint
Unified Messaging Engineering Guidelines.
Q: How are new third party T.38 gateways added to the compatibility list?
A: Additional gateways are added to the compatibility list via testing with the SIP interoperability
lab. Devices can be submitted for approval through the SIP Interoperability Lab, model and
manufacturer should be stated when applying for compatibility testing.
3300 IP Ports
The table below shows the IP port numbers used with standalone MiVoice Business and 3300
ICP systems. It is not a definitive list, but is sufficient to identify voice connectivity. New features
and applications may result in additions to this list.
Additionally there may be ports in here that are specific to the 3300ICP that may not be available
on a MiVoice Business for ISS platform using x86 processors. The MiVoice Business
Multi-instance Media Server port ranges will differ and are covered in the specific Engineering
Guidelines for that product.
For information regarding which ports are used by applications that are external to the 3300
ICP, refer to the documentation for that particular application.