Telos Zephyr User Manual page 201

Two DSP Card (5 DSP) Configuration
PORT 1 PORT 2
OUT OUT
V.35 SERIAL PORT
GLUE LOGIC
Xmt Modes: L3 STEREO; L3 JSTEREO
In the above modes, both ports are used with an internal splitter to transmit a single
112/128kbps stream. The last DSP and glue logic split this bitstream into two 56/64kbps
channels. Unlike the DUAL mode, there is no relation between the audio input channels
(A and B) and output ports (1 and 2). Both bitstreams must be sent to the same decoder
for proper operation. However, it is irrelevant which ports go to which stream, as the
decoder software is able to automatically determine which is which in order to properly
reassemble them.
The system clock is taken from either Port 1 or Port 2. The first port with an active
Carrier Detect signal is used, with a default to Port 1 when there is no CD active on
either port.
Xmt Modes L2 MONO128, L2 DUAL, L2 JSTEREO use both cards, but only U1 on each.
M O N O D S P C A R D
DSP56002 DSP56002
U2 U3
S T E R E O D S P C A R D
DSP56002
U2
Section 11
U1
A(left)
B(right)
U1
TECHNICAL INFORMATION
AUDIO
201