Nortel Networks NN43011-110 manual Memory, processing, and data storage

22Description and features

When the main power is cut off to the system, optional PFTUs connect predetermined analog (500/2500-type) telephones directly to the CO trunks. The PFTU supports five to eight telephones, depending on the PFTU used.

Memory, processing, and data storage

Small Systems use a Motorola 68040 CP with VxWorks operating system. The processor, which is located on the Small System Controller (SSC) card in the Main Cabinet or Chassis, handles call processing, serial ports, and network traffic. In addition, CS 1000M systems use a Signaling Server, which provides a central processor to drive H.323 and Session Initiation Protocol (SIP) signaling for IP Phones and IP Peer Networking.

Small Systems support global software as well as any IP cards.

The memory architecture of the system has program and data stored in physically separate memory components: flash ROM and DRAM, respectively. The majority of system and customer-configured data is both controlled and stored on the SSC card’s flash ROM. The DRAM stores and processes temporary automated routines and user-programmed commands.

Two flash drives on the SSC card perform software operations and store customer data:

•The primary flash drive contains system data as well as the first copy of customer data that must exist to load and run the switch. The primary flash drive is programmed with system software before it is shipped to the customer.

•The backup flash drive stores modifiable files containing data such as configuration data, or a second copy of the customer database. If the primary flash drive fails, you can retrieve a backup set of customer data to load into the system’s active database.

There are four areas on the SSC card where customer data records can be stored:

•DRAM — stores and accesses the active version of customer records, system data, and overlay data. Data from the primary flash drive overwrites data in DRAM storage during a SYSLOAD (system reload).

•Primary flash drive (C:) — contains two copies of customer records (primary and backup records).

•Backup flash drive (Z:) — retains the true backup copy of the customer database.

•PC Card slot (A: or B:) — allows a complete copy of the customer database to be stored on a Software Delivery card (PC Card) inserted into this slot. The customer database on the PC Card can then be removed for storage away from the SSC card.

Nortel Communication Server 1000

Communication Server 1000M and Meridian 1 Small System Overview

NN43011-110 01.01 Standard

Release 5.0 30 May 2007

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