Filter
Top Products
2-23
Cisco MGX 8800/8900 Series Hardware Installation Guide
Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006
Chapter 2 Illustrated Card List for MGX Switches and the MGX 8880 Media Gateway
Front Cards
Figure 2-8 shows how a single AXSM connects to redundant APS lines.
Figure 2-8 1:1 APS Line Redundancy Configuration—AXSM Cards
CESM
Supported models: MGX 8850 (PXM1E/PXM45), MGX 8850/B (PXM1E/PXM45), MGX 8830, MGX 8830/B
CESM cards are service modules that provide a CBR circuit emulation service by converting data
streams into CBR AAL1 cells for transport across an ATM network. The CESM supports the CES-IS
specifications of the ATM Forum.
The CESM cards allow individual physical ports to be configured for structured (channelized) or
unstructured (unchannelized) data transfer. The CESM allows circuit-based equipment, such as PBXs,
to be interconnected over an ATM backbone via CBR connections. The eight-port CESM cards support
both channelized (n x 64 kbps) and unchannelized (T1/E1) circuit-based equipment.
Synchronous clocking and asynchronous clocking, using either synchronous residual time stamp (SRTS)
or adaptive clock recovery, are both supported.
Dynamic bandwidth allocation is supported through on-hook/off-hook detection that relinquishes
backbone bandwidth when it is not required by the applications. This allows other traffic streams, such
as VBR and ABR traffic, to take advantage of the bandwidth normally reserved for the circuit traffic.
AXSM front card AXSM back cards
Working line B
45055
Midplane
Protection line B
Working line A
Protection line A