Ec1-12 Card; Figure; Ec1-12 Slots And Connectors; Ec1-12 Faceplate And Block Diagram - Cisco 15454-DS1-14= - 1.544Mbps Expansion Module Reference Manual

Chapter 3 Electrical Cards
BERT Alarms
The BERT feature can raise the following two alarms in CTC:
•
•
Both the alarms are non-reportable conditions, non-service affecting, and no severity is associated with
these two conditions.

3.3 EC1-12 Card

Note For hardware specifications, see the
The EC1-12 card provides 12 Telcordia-compliant, GR-253 STS-1 electrical ports per card. Each port
operates at 51.840 Mbps over a single 75-ohm, 728A or equivalent coaxial span.
STS path selection for UNEQ-P, AIS-P, and bit error rate (BER) thresholds is done on the SONET ring
interfaces (optical cards) in conjunction with the STS cross-connect. The EC1-12 terminates but does
not select the 12 working STS-1 signals from the backplane. The EC1-12 maps each of the 12 received
EC1 signals into 12 STS-1s with visibility into the SONET path overhead.
An EC1-12 card can be 1:1 protected with another EC1-12 card but cannot protect more than one EC1-12
card. You must install the EC1-12 in an even-numbered slot to serve as a working card and in an
odd-numbered slot to serve as a protect card.

3.3.1 EC1-12 Slots and Connectors

You can install the EC1-12 card in Slots 1 to 6 or 12 to 17 on the ONS 15454. Each EC1-12 interface
features DSX-level (digital signal cross-connect frame) outputs supporting distances up to 450 feet
(137 meters) depending on facility conditions. See the
Backplane" section on page 7-5
restrictions.

3.3.2 EC1-12 Faceplate and Block Diagram

Figure 3-1

78-18106-01
BERT_ENABL—Specifies that BERT feature is enabled.
BERT_SYNC_FAIL—Synchronization is necessary and occurs when the errors injected by the TPG
reach the TPM and connectivity is established. The BERT_SYNC_FAIL alarm occurs when
synchronization fails.
shows the EC1-12 faceplate and a block diagram of the card.
"A.5.1 EC1-12 Card Specifications" section on page
"7.2 Electrical Card Protection and the
for more information about electrical card slot protection and
Cisco ONS 15454 Reference Manual, R8.5
3.3 EC1-12 Card
A-17.
3-5