Datatek DT-4180 - Manual (Page 97)

9 4 8 0 , 4 1 8 0 , 4 2 8 0 , 4 2 8 4 4 0 0 0 X A U s e r M a n u a l
04/09/09
97
1 6 4 0 0 0 X A / 4 1 8 0 S P E C I F I C A P P L I C A T I O N S
16.1 The 4000XA/4180 as a Channel Bank Replacement
The 4000XA/4180 TSR port may be used as a channel bank replacement. This allows
up to 24 individual DS0 connections when the TSR is operating as a T1, and 32
individual DS0 connections when the TSR is operating at E1. The TSR supports sub-
channeling on a per timeslot basis.
Consider the following depiction of a typical channel bank installation:
Central Office
LTSs
NE
5ESS
BX.25
HDLC
BX.25
Central Office
LTSs
NE
5ESS
BX.25
HDLC
BX.25
TYPICAL MODEM CONNECTIONS
Network
Equipment
Channel
BANK
TDM
DS0
DS0
DS0
DS0
T1
56K/64K
Serial
Network
Data Center
In the diagram above, the individual DS0s are joined by the TDM network into a T1
interface to the channel bank. The Channel Bank terminates each DS0 and provides a
serial interface to the network equipment. The network equipment requires a serial port
for each of these connections.
Now, suppose it was desired to use the 4000XA/4180 as a channel bank replacement
as a direct “drop in”. That is, the serial connections are still to be made to the network
equipment. That diagram would look as follows: