TXC-04222-AIOG Transwitch Corporation, TXC-04222-AIOG Datasheet - Page 73

• Manufacturer Part Number: TXC-04222-AIOG
• Manufacturer: Transwitch Corporation

Specifications of TXC-04222-AIOG

• Screening Level: Industrial
• Package Type: BGA
• Lead Free Status / Rohs Status: Not Compliant

RECEIVE CROSS MAPPING APPLICATIONS
The TEMx28 supports cross mapping applications in which a DS1 format is carried in a VC-12 for transport by
a VT2/TU-12. The options associated with this feature are given in the following table. The cross mapping fea-
ture control in the drop direction is independent of the add direction. Please note: the cross connect feature will
not be supported when the VT/TU interface for channel n is selected.
LINE AIS INSERTION
An Alarm Indication Signal (AIS) is defined as an unframed all ones signal for both the DS1 (1544 kbit/s) and
E1 (2048 kbit/s) line rates. Line AIS will be inserted into the interface data lead (including the VT/TU) interface
for channel n for the drop bus alarms when enabled. In addition, the microprocessor can also force the AIS
state independent of the drop side alarms. When control bit RnSEL is a 0, the A side Drop bus VT/TU is
selected. When RnSEL is a 1, the B side drop bus VT/TU is selected. The following is a list of alarms and
enable bits for controlling the insertion of receive line AIS.
- When control bit RnAISE is a 1 and the side that is active (RnSEL bit state):
- When control bit RnAISE is a 0:
Note: The AIS will be sent for two to three multiframes when a receive FIFO error occurs.
X+012H/082H
VT/TU Select
A/B Drop
- Drop Bus Loss Of Clock (ADLOC, BDLOC) when DLCAE is a 1
- Drop Bus AIS alarm (AxUAIS, BxUAIS) when HEAISE and UAISE are 1
- Loss of pointer alarm (AnLOP, BnLOP)
- VT/TU AIS detected (AnAIS, BnAIS)
- Unequipped signal label (AnUNEQ, BnUNEQ) when UQAISE is a 1
- Mismatch signal label (AnSLER) when PLSAISE is a 1
- J2 Loss Of Lock Alarm (AnJ2LOL, BnJ2LOL) when J2AISEN is a 1
- J2 Mismatch Alarm (AnJ2TIM, BnJ2TIM) when J2AISEN is a 1
- VT AIS detected (AnVCAIS, BnVCAIS) when VCAISE is a 1
- TC Loss Of Multiframe (AnTCLM, BnTCLM), TC enabled and TCTAE is a 1
- TC Loss Of Lock Alarm (AnTCLL, BnTCLL), TC enabled and TCTAE is a 1
- TC Mismatch Alarm (AnTCTM, BnTCTM), TC enabled and TCTAE is a 1
- TC Unequipped Alarm (AnTCUQ, BnTCUQ), TC enabled and TCUAE is a 1
- TC AIS Detected (AnTCAIS, BnTCAIS), TC enabled and TCAISE is a 1
- Control bit RnSAIS is a 1)
- FIFO alarm (AnRFFE, BnRFFE)
Register
- Control bit RnSAIS is a 1)
Bit 7,
0
0
1
1
Proprietary TranSwitch Corporation Information for use Solely by its Customers
Bit 4, X+006H
RnE1SL,
0
1
0
1
DS1 Asynchronous format demapped from a VT1.5/TU-11.
Not used.
Cross Mapping. DS1 Asynchronous format demapped from a VT2/TU-12.
E1 Asynchronous format demapped from a VT2/TU-12.
DATA SHEET
- 73 of 246 -
Operation
TXC-04222-MB, Ed. 6
TXC-04222
TEMx28
June 2003