Telos Zephyr Xstream User Manual page 174

Z
ZEPHYR CLASSIC VS XSTREAM COMPARISON
Since the Zephyr does not have the L3 Dual/Mono Receive mode, data corruptions on either
data channel will cause dropouts on both audio channels. Therefore, Zephyr users
performing troubleshooting tests would need to switch to mono operation, over a single data
channel, to verify each channel separately.
•
For two‐port operation in the Dual/Mono mode, audio channel A
corresponds to PORT 1 and audio channel B corresponds to PORT 2, when
both are used.
V.35/ X.21
PORTS 1 & 2
(MINI 40 p in)
ZEPHYR™
Xstrea m
Two port operation supporting 56x2 or 64x2 kbps for mono128 or Stereo operation using both
V.35/X.21 ports. The Interface selection in the TEL menu should be set to" V.35 Split"
Control Leads
There are a number of "control leads" defined in the V.35 and X.21 standards. CSU/DSUs will
frequently have indicator lights showing the status of these signals, which may be useful when
troubleshooting problems.
In the direction Zephyr Xstream ‐> TA/CSU, the Xstream provides DTR (Data Terminal Ready)
and RTS (Request to Send). Both of these signals are made active when the V.35 interface is
selected and the Zephyr Xstream is ready for operation.
h
HOT TIP!
Since the data is generally clocked from the master clock at the Telco anyway, handshaking is
unnecessary. Timing variations between the various handshake signals varies and may cause
equipment incompatibilities. If this occurs, it is entirely ok to disable handshake signals on
the CSU/DSU using the appropriate DIPswitch or command.
USER'S MANUAL
DATA PORT
(V.35/ X.21)
LINE
CSU/ DSU
DATA PORT
(V.35/ X.21)
LINE
CSU/ DSU
Section 9: The V.35/X.21 Interface Option
To SW56
To SW56
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