Fiber Optic Transceivers Service for 1660SM 3AL78817AA 3AL78830AE

Fiber Optic Transceivers Service for 1660SM 3AL78817AA 3AL78830AE

SERVICE For 1660SM, Part Number:3AL78817AA 3AL78830AE,

We have a new stock of all parts in the

EMC/1646SM/1646SMC series.

We have a professional import and export team to help you quickly handle customs clearance.

If you only need hardware, please sendus the part model and theBOM number.

If you have network design requirements, please sendus the following information:

1,Number ofnetworksites. 

2,NetworkSite Topology.

3,Fibre-optical distance and attenuation. 

4,Type and number of service ports. 

5,Protectiontype.

6,Futurenetwork expansionrequirement.

Two types of SERVICE Interfaces unit are provided (see para.2.3 on page 49):

•the first manages all the following functions

•the second manages the synch.function only

The SERVICE card provides the following functions:

[1]AUX (auxiliary) channels management

[2]Input/output clock management

[3]EOW channels management

[4]POWER SUPPLY for internal board use.

[1] AUX channel management

It provides:

–four G.703 64 Kbit/s channels, ITU-T G.703 compliant

–four V11 channels, every one composed by data input, data output and clock

–four RS-232 channels

–two 2 Mbit/s G.703 signals that can be used as auxiliary channels

All the electrical interfaces are managed by the Matrix present on the unit.

[2] Input/Output clock management

Function performed:

–the unit can receives up to two 2 MHz clock (T3a and T3b) or up to two 2Mbit/s signals (T6a and T6b) that could be used to synchronize the N.E.The unit provide software programmability to switch between the two mode.

–the unit provides up to two 2 MHz clock (T4a and T4b) or up to two 2Mbit/s signals (T5a and T5b) that can be used by another N.E.for synchronism purpose.The unit provide software programmability to switch between the two mode.