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4.3.4 |
ITSP features |
Emergency numbers, special numbers, 0180/0800 services |
| • | 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 S0 accesses. |
| • | Special number are not transferred by all ITSPs. We recommend transferring the following special numbers by default over ISDN: |
Least Cost Routing (LCR) |
| To make trunk calls to selected service providers or services (such as 0180/0800 numbers), the LCR must be adapted. |
Bandwidth control |
| All connections to the 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. |
| Restrictions in voice quality can occur in connections that are not QoS-capable (in general, ADSL connections). High voice quality is generally achieved if a non-QoS-capable Internet telephony connection is used exclusively for voice connections to the ITSP. |
| Connection can suffer temporary interruptions as a result of the provider's network availability. Please note the terms and conditions of the ITSPs. If connection setup via SIP fails, they can be set up by HiPath 3000/5000 V9 (HG 1500 V3.0) via ISDN. |
| The router used by the customer must be able to guarantee good voice quality over QoS functions and bandwidth control mechanisms. Although four different ITSPs may be registered simultaneously, more connections may be possible depending on bandwidth. |
Calling party identification: |
| The CLIP and CLIR features are implemented differently in the individual ITSPs. Restrictions may occur in call number display or entries may occur in the missed calls list. The CLIP no Screening feature is currently not supported. The B station's display/missed calls list shows the station number of the line to the ITSP - not that of the calling A station. |
Connections with breakout into the fixed network/mobile telephone system or from the fixed network/mobile telephone system |
| Provider-internal connections (destination is busy/not registered) Internal connections to a busy or unregistered station are generally signaled correctly. |
Calls to other ITSPs |
| These calls are technically feasible, however, the individual providers match the routing functions in their network with the relevant business model. For more information, consult the relevant ITSP. |
Call data evaluation |
| The SIP protocol records itemized call data by time. Evaluation is possible using external applications, such as, Teledata Office. |
DTMF transmission over IP |
| DTMF signals are transmitted in the voice channel. The G.711 codec is required for secure transmission to the provider. |
Fax transmissions |
| Fax transmissions are not supported by every provider. We recommend using ISDN for fax transmissions (default setting). |
| In HiPath 3000/5000, gateway T.38 channels are used for fax transmissions over ITSP connections. Fax transmissions over the Internet using G.711 are often disrupted or do not work properly. Therefore fax transmission over Internet telephony and G.711 is not supported. If the provider supports the T.38 protocol, then T.38 must be activated in the gateway. Otherwise ISDN should be used for the transmission. |
Modem transmissions and ISDN data services (for example, the use of EC cash devices) are not supported |
| These services are not supported. |
CSTA Monitoring of Connections to ITSPs |
| These services are not supported. Applications that provide this feature are consequently not supported (for example, call centers). |
| HiPath 3000/5000 V9, Feature Description, Issue 7 | up  |
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| Disclaimer & Copyright | ID: P31003H3590F100017618 | 2012-06-25 |