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CHAPTER
4-1
Cisco AS5800 Universal Access Server Dial Shelf Card Guide
78-7097-03 0A
4
Double-Density Modem Card
The Cisco AS5800 universal access server uses the Cisco Modem ISDN Channel Aggregation (MICA)
double-density modem module cards (DMMs) to convert analog pulse-code modulation (PCM)
bitstreams to digital data.
This chapter discusses the use of the double-density modem card in the Cisco 5814 dial shelf, the LEDs
on the front of the card, the firmware that is used, and also includes steps for configuring your software
and verifying and troubleshooting your DMM installation.
CT1/CE1 Trunk Card Overview
The Cisco AS5800 accommodates a maximum of ten CT1/CE1 trunk cards that use Cisco’s MICA
technology with upgradable firmware. Each CT1/CE1 trunk card plugs directly into the dial shelf
backplane and has no external connections. Each CT1/CE1 trunk card has five LEDs, which indicate
modem card status.
The Cisco AS5800 is capable of terminating as many as 1,344 modem connections when equipped with
ten CT1/CE1 trunk cards and two CT3 trunk cards.
Each double-density modem card contains 12 DMM SIMMS. Each DMM SIMM contains 12 digital
modems.
Figure 4-1 shows the double-density modem card components.
Figure 4-1 Double-Density Modem Card Components
12684
MODEM
PWR
HCPU
CALLS
MAINT
MODEMS
DRAM
SIMMs
CPU MBusTDM busDC/DC converters
Double-density
modem modules
(DMMs)
LEDs