TXC-06101AILQ Transwitch Corporation, TXC-06101AILQ Datasheet - Page 13

• Manufacturer Part Number: TXC-06101AILQ
• Manufacturer: Transwitch Corporation

Specifications of TXC-06101AILQ

• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Operating Temperature (max): 85C
• Package Type: PQFP
• Rad Hardened: No
• Lead Free Status / Rohs Status: Not Compliant

Section Overhead Definitions - SOH
The definitions for the Section Overhead Bytes are given below.
A1, A2:
C1:
J0:
Z0:
B1:
E1:
Framing - Two bytes are allocated in each STS-1 for Framing. The Pattern is A1 = F6[H] and
A2 = 28[H]. These bytes are provided in all STS-1 portions of an STS-N/Nc signal.
STS-1 I.D. - In earlier editions of the SONET standard, one byte labeled C1 in each STS-1
was allocated for an STS-1 identification function. These bytes are no longer used for this
purpose. Instead, this overhead is currently allocated for Section Trace and Section Growth
(defined below). However, to ensure interworking with older equipment, these bytes must be
capable of transmitting and receiving the STS-1 Identification Codes. When used in this man-
ner the following definition will apply. The C1 byte in Each STS-1 shall be set to a binary num-
ber corresponding to its order of appearance in the byte-interleaved STS-N frame where
01[H] is the number for the first STS-1 appearing in the frame. The C1 Byte is defined for all
STS-1s in an STS-N/Nc signal.
Section Trace - One byte is allocated to be used for a Section Trace function. This byte is
defined only for STS-1 number one in an STS-N/Nc signal. J0 (formerly C1 of STS-1 number
one) is used to repetitively transmit a one-byte fixed length string so that a receiving terminal
can verify its continued connection to the intended transmitter. Any value in the range of
00[H] through FF[H] may be placed in this byte. When the Section Trace function is not sup-
ported or if no value has been assigned then 01[H] shall be transmitted.
Section Growth - One byte is defined in each STS-1 for future growth, except for STS-1 num-
ber one (defined as J0). For interworking with older equipment, the Z0 bytes shall be capable
of being set consistent with the C1 definition described above.
Section BIP-8 - One byte is allocated for a Section Error Monitoring function. This function is
a bit-interleaved parity 8 code using even parity. The Section BIP-8 is calculated over all bits
of the previous STS-N/Nc frame after scrambling. The computed BIP-8 is placed in the B1 Byte
before scrambling. This byte is defined only for STS-1 number one of an STS-N/Nc signal.
Orderwire - One byte is allocated to be used as a Section Orderwire. This is a local orderwire
channel reserved for voice communications between STEs, hubs, and remote NEs. It is only
defined for STS-1 number one.
Proprietary TranSwitch Corporation Information for use Solely by its Customers
STS-1
#
D10
A1
B1
D1
H1
B2
D4
D7
S1
1
Transport Overhead (First 9 Columns of STS-3c Frame)
H1c
A1
B2
Z1
2
= Undefined Overhead Byte = 00000000
Figure 10. STS-3c Overhead
H1c
A1
B2
Z1
3
D11
A2
E1
D2
H2
K1
D5
D8
Z2
1
- 13 of 196 -
H2c
A2
Z2
2
DATA SHEET
H2c
A2
M1
3
C1/J0
D12
F1
D3
H3
K2
D6
D9
E2
1
C1/Z0
H3
2
C1/Z0
H3
3
Path Overhead
B3
C2
G1
H4
J1
F2
Z3
Z4
Z5
TXC-06101
Ed. 3, April 2001
TXC-06101-MB
PHAST-1