Chapter 2

2.1 DXX Network Management in PTCL MTR

To manage DXX Corporate Circuits in MTR a network management center has been established in central exchange,Multanin spite of NOC.The said network management center is responsible for handling customer complaints and managing the DXX nodes region-wide.Different telecom vendors provide access multiplexers that can be used as DXX nodes.

Alcatel MainStreet 3600 Loop-AM3440 BAYLY Omniplexer

PTCL is using LOOP Telecoms Access Multiplexer Loop-AM3440 as DXX node.The services and operations of the network of these Access Multiplexers is managed by the network management system INMSprovided by LOOP Telecom.Inspire of the cluster of Loop-AM3440 there are Alcatel Mainstreet 3600 DXX nodes deployed at some stations.

Figure 2 DXX Network Layout

Customer Premises

Equipment(Router)

PTCL DXX DTU (LOOP H3310)

MDF

PTCL DXX DTU (LOOP H3310)

MDF

Customer Premises

Equipment(Route)

PTCL DXX Node LOOP-AM3440

Transmission Equipment(SDH)

PTCL DXX Node

LOOP-AM3440

2.2 Loop-AM3440:

The Loop-AM3440-A is a large access DCS-MUX that combines various digital access interfaces into E1or T1 lines for convenient transport and switching. This device provides access for a variety of TDM, IP, and voice interfaces that are compatible with a variety of other Loop products. Using these products, a DTE interface can be extended over copper wire pairs or any E1/T1 transport facility. Each Quad E1/T1 plug-in card can have as many as DS0 124/96 time slots from G.SHDSL, RS232, X.21, V.35, V.36 and EIA530 / RS449 interfaces, which can be multiplexed to fill 4 E1/T1 lines. The AM3440 also supports fiber optical plug-in cards, which can be used to aggregate up to 4 E1 channels onto a single fiber optical interface to connect with other AM3440 devices or with the O9310-E1. With a number of plug-in slots in single slot size and mini size, this unit can be fully configured to any user's needs. The AM3440-A is a full cross-connect and can act as a mini DACS; one or more of the WAN ports can be used as a Drop & Insert function with fractional E1/T1 lines, which can be muxed into a full E1/T1 line. The AM3440 supports local control and diagnostics by using an external 2-line by 40-character LCD display and keypads, or by using a VT-100 terminal connected to the console port. The AM3440 also supports Ethernet, Telnet, and SNMP so that it can be controlled and diagnosed from remote locations. An in-band management channel with GUI is available. In addition to the LCD display, there is LED indication for all plug-in cards. The AM3440 consists of a rugged reinforced aluminum chassis, giving this equipment a more durable structure and a longer physical life.[4]

Figure 3 Loop-AM3440