Octel XC1000, Service Manual

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COMPONENT DESCRIPTIONS
10-14 Edition One XC1000 Service
10.3 LINE-CARD GROUPS
The line-card-groups comprise the digital line cards (DLCs) and the telephone
interface cards (TICs). TICs can be either analog or digital. If the XC1000
has the hot-plug capability, service personnel can replace existing DLCs and
TICs while the XC1000 is on-line. Menu 13.11, Review Card Management,
shows the status of all installed line-card groups. The service engineer uses
menu 13.11 when replacing a hot-plug DLC or TIC. Refer to section 8.3.2
for information about replacing hot-plug DLCs and TICs.
The line-card group configuration depends on the type of TIC being used. The
types of line-card groups for the XC1000 are as follows:
Analog Line-Card Groups
Two ATICs and two DLCs
Two DID TICs and two DLCs
Two E&M TICs and two DLCs
Digital Line-Card Groups
One T1 TIC and two DLCs
One E1 TIC and three DLCs
One PTIC and three DLCs
Each DLC has 12 channels. ATICs, DID TICs, and E&M TICs each provide
a 12-channel analog interface, so two TICs and two DLCs are used per
line-card group. A T1 TIC is a 24-channel digital interface between two
DLCs and the switch. E1 TICs and PTICs provide a 30-channel interface,
so one TIC and three DLCs are used per line-card group; the last four
channels on the third DLC are not used, and two of the channels are used
for signaling purposes.
ATIC, DID TIC, E&M TIC, and T1 TIC line-card groups supply 24 voice-channel
connections to the switch. The 24 ATIC, DID TIC, and E&M TIC channels
connect to ground- or loop-start trunks or CO trunks. The 24 T1 TIC channels
connect to a T1 carrier.
PTIC and E1 TIC line-card groups supply 30 voice-channel connections to the
switch. Single-cabinet XC1000s support up to three PTIC or E1 TIC line-card
groups, for a total of 90 ports. Dual-cabinet XC1000s support up to four PTIC
or E1 TIC line-card groups, for a total of 120 ports.
Universal DLCs (UDLCs), P/N 244–2058–010, are required for fax-capable
XC1000s using Release 2.X software or newer.
The DLC in a line-card group acts as the intelligent interface between the
XC1000 control cards (CPU and file cards) and the TICs. The TICs in a
line-card group supply a trunk interface between the DLCs and the public
switched network.
The DLCs and TICs in each line-card group communicate through a serial
pulse-code modulation (PCM) bus. The DLCs and TICs transmit data, signals,
SECTION 10.3