Rainbow Electronics DS31256 - Manual (Page 178)

DS31256
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Figure 15-3. Quad T1/E1 Connection
15.1 16 Port T1 or E1 with 256 HDLC Channel Support
Figure 15-4 shows an application where 16 T1 or E1 links are framed and interfaced to a single DS31256.
The T1 lines can be either clear-channel or channelized. The DS21Q55 quad T1/E1/J1 single-chip
transceiver performs the line interface function and frames to the T1/E1/J1 line.
Figure 15-4. 16-Port T1 Application
DS31256
ENVOY
DS21Q55
Transceiver
Port 0
Port 1
Port 2
Port 3
Port 4
Port 5
Port 6
Port 7
Port 8
Port 9
Port 10
Port 11
Port 12
Port 13
Port 14
Port 15
Four
Four
Four
Four
T1 or E1Lines
DS21Q55
Transceiver
DS21Q55
Transceiver
DS21Q55
Quad T1/E1
Transceiver
Quad T1/E1
Quad T1/E1
Quad T1/E1
T1 or E1Lines
T1 or E1Lines
T1 or E1Lines