User's Manual

Table Of Contents
8 Web Page Reference
153
8.3.1.6 Telecoms Configuration Page
The PTP600 is capable of carrying up to two T1 or E1 channels when there is sufficient
wireless capacity. When there is insufficient capacity the wireless carries timing information
which maintains clock synchronization. When operating in timing only mode, no telecoms
data is sent.
When a wireless link is established the unit calculates a suitable telecoms latency for reliable
link operation. Links which are able to operate consistently in a high modulation mode can
take advantage of lower link latency. This is controlled by setting the "Lowest Telecoms
Modulation Mode" during installation. Appropriate settings for this control may be determined
by using the LINKPlanner tool.
The user may select the lowest telecoms modulation mode from a full range of modes in the
Installation Wizard. However, the unit may override the user setting if the selected mode has
insufficient capacity to carry the telecoms data. Other modes may also be excluded if they
demand very high latency and require more buffering than the wireless can provide. Given
these constraints, the unit will display the effective "Lowest Modulation Mode". When the
effective mode differs for Single and Dual Payload operation two modes will be displayed:
"Lowest Dual Payload Modulation Mode" and "Lowest Single Payload Modulation Mode".
Configuration
The Telecoms page (
Figure 66) is available when the Telecoms Interface has been set to
either T1 o
r E1 in the Installation Wizard.
The unit displays the interface setting and line code for the available telecoms channels. The
PTP 600 Series Bridge is able to support two T1 or E1 channels. These channels are referred
to as "Channel A" and "Channel B".
The "Channel B" configuration and controls will be displayed only when the second channel is
enabled.