Zhone Technologies Network Device manual MCC In a Multilevel Concentration Application

Zhone Technologies, Inc. IMACS Product Book, Version 4

configurable port parameters are permanently stored in NVRAM and downloaded to the card during startup. Statistics are available on a per port and protocol basis.

IP-based management information from IMACS clients is typically provided to the MCC by a Digital Access and Cross-connect System (DACS) as Bit Seven Redundant (B7R) or Bit Four Redundant (B4R) DS0 channels on a T1 or E1 link. The MCC routes IP packets among the 131 available WAN interfaces, the local host CPU and Ethernet. Each interface represents a separate network or subnet as specified by the IP address and Netmask combination. Three of the 131 are high-speed interfaces that can either be configured as Nx64 kbps (N=1 to 24 for T1 or 1 to 31 for E1). Those interfaces can independently be configured for the Frame Relay protocol or for transparent HDLC. The 128 lower-speed WAN interfaces can be configured in groups of 64, to either be in BnR mode.

Figure 31 shows FDL channels from the remote IMACS a, b, c, and fed into a DACS II for translation into multiple B7R encoded DS0 channels. IMACS I, connected to the DACS II, routes IP datagrams to IMACS II through the alternative high-speed interfaces. IMACS II in turn routes datagrams to the Local Ethernet to the NMS.

Remote IMACS using FDL

IMACS

IMACS

IMACS

DAC S

1 Nx64 Kbps T1/E1

IMACS w/MC C

2 Nx64 Kbps T1/E1 Nx 64Kbps T1/E1

B7R formatted DS0's from DACS II

IMACS

w/MC C

NMS

Figure 31—MCC In A Multilevel Concentration Application

March 2001 Page 80