TXC-03303AIPQ Transwitch Corporation, TXC-03303AIPQ Datasheet - Page 37

• Manufacturer Part Number: TXC-03303AIPQ
• Manufacturer: Transwitch Corporation

Specifications of TXC-03303AIPQ

• Lead Free Status / RoHS Status: Not Compliant

Address
0A
0B
08
09
Bit
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
6
5
4
3
2
1
0
6
5
4
3
2
1
0
Symbol
LBDS3
LBALL
LB25
LB21
LB17
LB13
LB26
LB22
LB18
LB14
LB10
LB27
LB23
LB19
LB15
LB11
LB28
LB24
LB20
LB16
LB12
LB9
LB5
LB1
LB6
LB2
LB7
LB3
LB8
LB4
Receive Loopback Requests: Bit 7, LBALL (all DS1 channels), and bits 6-
0 (LBn) indicate the loopback request detected. For the M13 mode, a loop-
back request is received when any of the conditions (C-bit or stuff) are
detected five or more times in succession. The remote loopback selection
is determined by the states written to the 1LBVn bits in register location
20H. A remote loopback request is cancelled when the normal state of the
bit is received five or more times in succession. In the C-bit parity mode, a
remote loopback request is received by detecting the FEAC connect word
five times in succession, followed by five consecutive receptions of the DS1
channel number word. A remote loopback request is cleared upon the
reception of five consecutive disconnect FEAC messages followed by the
reception of the DS1 channel number word. The M13E will also respond to
the conditions (C-bit or stuff) set up by the 1LBVn bits in register location
20H while in C-bit parity mode. Note: It is possible to have multiple loop-
backs set.
Once a loopback request is received or taken down in registers 08H-0BH,
the microprocessor must write the appropriate code to register 1EH to cor-
respondingly set up or take down the loopback in the appropriate DS1
channel.
When detecting loopback requests via the mechanism indicated by the
1LBVn bits in register 20H, the M13E must have DS2 and DS3 frame syn-
chronization. When detecting loopback requests via the FEAC channel, the
M13E must have DS3 frame synchronization and not be receiving DS3 AIS
or DS3 Idle signals. LBALL is valid only in C-bit parity mode.
Receive Loopback Requests: Bits 7 (LBDS3) and 6-0 (LBn) indicate loop-
back requests sent by the distant end for either a DS3 loopback or for the
DS1 channels indicated. For complete explanation, see 08H. LBDS3 is
valid only in C-bit parity mode.
Receive Loopback Requests: Bits 6-0 (LBn) indicate loopback requests
sent by the distant end for the DS1 channels indicated. For complete expla-
nation, see 08H.
Receive Loopback Requests: Bits 6-0 (LBn) indicate loopback requests
sent by the distant end for the DS1 channels indicated. For complete expla-
nation, see 08H.
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Description
Ed. 4, August 1998
TXC-03303
TXC-03303-MB
M13E