Cisco Systems MGX 8230 Bulk Distribution for T1 Service, T1Slot T1 slot number, in the range

Chapter 6 Card and Service Configuration

Service Resource Module

•dsplink

•dellink

•addred

•dspred

•delred

Bulk Distribution for T1 Service

The MGX-SRM-3T3/C supports a demultiplexing function called bulk distribution. With bulk distribution, the MGX-SRM-3T3/C converts traffic from its T3 lines to T1 channels and sends the data streams across the distribution bus to the appropriate service modules. The benefit of this feature is that the number of T1 cables and back cards is greatly reduced. Applicable service modules are the MGX-AUSM/B-8T1, AX-FRSM-8T1, and AX-CESM-8T1.

At its MGX-BNC-3T3-M back card, the MGX-SRM-3T3/C connects to an external multiplexer. The multiplexer connects to the T1 lines from user-equipment and places the data streams on T3 lines to the MGX-SRM-3T3/C. Each T3 line can contain 28 T1 channels. An individual MGX-SRM-3T3/C can support 8 card slots, so the maximum number of T1 channels it can process is 64.

Linking the MGX-SRM-3T3/C to a destination card causes the shelf to take CPE traffic through the MGX-SRM-3T3/C rather than the T1 card’s line module. Linkage is a card-level condition. If you link just one T1 channel on a service module to the MGX-SRM-3T3/C, the back card on the service module becomes inoperative, so you must link all other T1 ports on that service module to the MGX-SRM-3T3/C if you want them to operate. Linking T1 ports into a group does not form an N X T1 channel. Each T1 channel remains a distinct T1 channel. Furthermore, a group belongs to one slot, so it cannot include T1 channels belonging to another card.

For a description of how the MGX-SRM-3T3/C supports redundancy for linked channels, see the section “Redundancy Support by the MGX-SRM-3T3/C” in this chapter.

Before configuring bulk distribution on an SRM, perform the following tasks:

1.Activate the lines (addln on the CLI).

2.Optionally configure the lines (cnfln on the CLI).

3.Display the state of the lines (dspln and dsplns on the CLI).

To link T1 ports on a service module to a T3 line on an MGX-SRM-3T3/C:

•Execute addlink on the active PXM1. Related commands are dsplink and dellink. addlink <T3 line number> <T1 slot> <NumberOfT1s> <TargetSlotLineNum>

•T3LineNum Line number in the format slot.line.

Slot = 7 or 14

Line range = 1–3

• T1Slot T1 slot number, in the range 1–28.

•NumberOfT1s Number of T1s, in the range 1–8.

	Cisco MGX 8230 Edge Concentrator Installation and Configuration
6-50	Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001