User's Manual

Lucent Technologies — Proprietary
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16-48
401-660-100 Issue 11 August 2000
Corrective Maintenance using Status Display Pages
References:
See the following documents for additional information:
■
AUTOPLEX Cellular Telecommunications Systems System 1000 Output
Messages (401-610-057)
2235 - Cell DCCH
Status Display
Page
The
2235 - Cell DCCH Status
page (See Figure 16-12, and Table
16-12)displays the summary state of the TDMA digital control channel (DCCH)
radios. Maintenance commands are also available on this display page.
IS-54 TDMA is enhanced by implementing the DCCH feature as described in the
IS-136 standard. The DCCH performs the setup function for mobile subscribers
using IS-136 compliant TDMA/AMPS dual-mode mobiles.
The DCCH is used in place of the analog control channel (ACC). The DCCH is
carried by a TDMA radio (DRU, EDRU) configured as a DCCH radio, and the ACC
is carried by an AMPS radio (RCU, SBRCU) configured as a setup radio.
For the TDMA radio (DRU, EDRU), there is one non-volatile memory (NVM) image
file for the DCCH radio, digital voice radio, and digital beacon radio. The RCC
downloads the personality type and other specific parameter values to each
TDMA radio at initialization. Since a TDMA radio provides a basic modulation
efficiency of three user channels (1 - 3) per 30-kHz of bandwidth, the DCCH radio
may also carry digital traffic and beacon channels. The DCCH is carried on user
channel 1.
Typically, there is one DCCH per physical antenna face, or sector, in a TDMA
system. Up to three DCCHs are allowed per sector.