Zhone Technologies IMACS Network Device - Manual (Page 28)

Zhone Technologies, Inc. IMACS Product Book, Version 4
March 2001 Page 24
3. Interface Cards
The Interface card has common hardware, which is managed by the active CPU card. One Interface card is required
per system residing in Slot IF on the IMACS chassis. It provides the physical interface to support a modem, control
terminal, printer, alarm relay, and provides the connection up to 8 T1/E1 interfaces used by the WAN cards. The
card also contains the clock hardware, which provides the entire back plane timing signals for the TDM buses. The
Interface card also contains the configuration database of the IMACS, time of day clock function and watchdog
timer.
The database resides in non-volatile SRAM, which enables it to retain its information even when the card is
unplugged or the IMACS is powered down. The IMACS has software configurable settings for both the primary
and secondary system-timing clocks. If the primary clock fails, the system will automatically switch to the operator
defined secondary clock source. The interface card contains the Stratum 4 clock hardware for providing internal
timing. Other timing options include: timing off the WAN card; timing off an installed ATM server card and timing
off an installed 826070 or 826171 BRI card. It also has an option for external timing from external synchronization
clocks (892260 IF card).
The Interface card may have a Modem port that is used to connect an ITU V.22 internal dial modem to a standard
telephone line. This port may be used either to log into the unit from a remote VT100 terminal or to send system
alarms to a remote device. The modem port presents an RJ11 female connector.
The node port on the Interface card provides the form-C contact closure and the physical interface so that the Alarm
Cut-Off (ACO) alarm may activate an external alarm system. The node port presents an RJ48 female connector
with an RS485 electrical interface.
The Control Terminal port is used to connect a VT100 or compatible terminal to the IMACS system for node
management and control purposes. The Control Terminal port presents an RJ48 female connector with an RS232
DCE electrical interface. The port is set to VT100 mode for asynchronous operation at 9600 bps with 8 data bits, 1
stop bit, and no parity. Also, the port supports an automatic log out feature after 15 minutes of inactivity.
The Computer Port connects a local device for printing alarms or can be configured to support SLIP for transport of
SNMP management information or database configuration information. IMACS Release 5.x provides support of
asynchronous PPP and SLIP. The computer port presents a DB9 male connector with an RS232 electrical interface.
The Interface card also stores ISDN Call profiles and signaling translation tables. All configuration information is
stored on the Interface card NVRAM for non-volatile storage of system configuration. A copy of the system
configuration is stored on the Interface card can be downloaded to the Flash memory on the CPU card. There are
eight Interface card Models:
1. 892060 Eight port T1/E1 Interface Card, 2400bps modem
2. 892160 Eight port T1/E1 Interface Card, no modem
3. 892260 Eight port T1/E1 Interface Card, no modem, with external sync input
4. 892360 Eight port T1/E1 Interface Card, 2400bps modem
5. 892460 Eight port T1/E1 Interface Card, no modem (required for CPU 8803)
6. 892560 Two port T1/E1 Interface Card, no modem or DB9 port
7. 892660 Two port T1/E1 Interface Card, 2400bps modem
8. 892760 Two port E1 Interface Card, no modem
The 8920 Interface Card supports eight T1 or E1 WAN links, via a 50-pin Amphenol connector. The card has a DB-
9 serial port for network management and two RJ48 jacks: one for an RS 485 node port and one for an RS-232 VT-
100 control terminal port. There is a RJ-11 modem port as well. It supports eight T1 or E1 WAN links. The