Howto:Maximum wire length: Difference between revisions
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(Q10065 - FAQ: What is the maximum wire length for the analog ports of an IP21? added) |
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This information applies to | This information applies to | ||
* IP21 | * IP21, IP22, IP24, IP28 | ||
==More Information== | ==More Information== | ||
=== IP21 === | |||
The maximum wire length is determined by the wires resistance. It is limited to 2x30 Ohm. | The maximum wire length is determined by the wires resistance. It is limited to 2x30 Ohm. | ||
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Note that long cables running in parallel may cause interferences between the | Note that long cables running in parallel may cause interferences between the ports | ||
=== IP22, IP24, IP28 === | |||
These devices can operate 3 standards phones per port simultaneously. The maximum wire length (0.6mm diameter assumed) is 170m then. If there is only one phone connected per port, the maximum is 1700m. This is for talking. Ringing requires much higher voltage and depends heavily on the type of phone used. The maximum linelength thus can be less. | |||
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[[Category:Faq|{{PAGENAME}}]] | [[Category:Faq|{{PAGENAME}}]] | ||
Revision as of 20:17, 19 November 2008
Applies To
This information applies to
- IP21, IP22, IP24, IP28
More Information
IP21
The maximum wire length is determined by the wires resistance. It is limited to 2x30 Ohm.
Here is the maximum line length as a function of the cable's diameter
| Cable diameter (mm) | Maximium wire length (m) |
|---|---|
| 0,4 | 200 |
| 0,6 | 450 |
| 0,8 | 800 |
Note that long cables running in parallel may cause interferences between the ports
IP22, IP24, IP28
These devices can operate 3 standards phones per port simultaneously. The maximum wire length (0.6mm diameter assumed) is 170m then. If there is only one phone connected per port, the maximum is 1700m. This is for talking. Ringing requires much higher voltage and depends heavily on the type of phone used. The maximum linelength thus can be less.