PEB2096 SIEMENS [Siemens Semiconductor Group], PEB2096 Datasheet - Page 33

• Manufacturer Part Number: PEB2096
• Description: Octal Transceiver for UPN Interfaces OCTAT-P
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

On U
2 kbit/s.
In the subscriber terminal the control channel is included again in the IOM-2 interface.
Depending on the terminal configuration two alternatives can be selected in the terminal
transceiver device.
The blocked/available information is translated directly into the S/G-bit (Stop/Go) when
no subsequent transceiver circuit is present in the terminal. The S/G-bit is evaluated by
the terminal HDLC-controller ICC. It stops data transmission immediately when the
S/G-bit is set to 1.
When an additional transceiver device is integrated in the terminal (e.g. an S
PEB 2081 (SBCX)) the control channel is translated into the A/B-bit. The A/B-bit is
monitored by the SBCX. A/B = 1 indicates that the corresponding D-channel is available
(A/B = 0 blocked). Depending on this information, the SBCX controls the E-bit on the
S
inverted D-bit state, the S/G-bit is set to high. As a result all active transmitters in the
terminal and on the S
The control channel is unidirectional and forwards the status information of the
corresponding D-channel (blocked or available) towards the subscriber terminal.
Different existing channel structures are used to implement the control channel between
the HDLC-controllers on the line card and in the subscriber terminal.
Control Channel Implementation on the U
The OCTAT-P uses the T-channel to transmit the control channel information to the
terminal. The T-channel is a subchannel of the U
Semiconductor Group
0
-bus and the S/G-bit on the IOM-2 interface. When A/B = 0 the E-bit is forced in the
PN
-line card, the control channel is integrated in the C/I-channel.
0
-bus are forced to abandon their messages.
33
PN
-Interface
PN
-interface with a bandwidth of
PEB 2096
0
-adapter,
01.96