Specifications

2 Specification
18
• Data rate
— T1: 1544 kbits/s ± 50 ppm
— E1: 2048 kbits/s ± 50 ppm
• Frame format
— T1: D4, ESF, and ESF-CRC6
— E1: E1 and E1-CRC4
• Line codes
— HDB3, AMI (ZCS), AMI, B8ZS
• Connector type
The connector type is determined by the RTM used, as defined in Section 2.3.4, “Rear
Transition Modules” on page 18.
2.3.3.2 V.11 Interface Properties
The properties of the V.11 interfaces are described as follows:
• Standard
Eight V.11 interfaces on all SS7HDC boards
• Compatibility
Compatible with ITU-T V.11 balanced, double current, interface circuits
• Data rate
Configurable as 48 kbits/s, 56 kbits/s or 64 kbits/s on a per port basis. Also, features a
configureable clock source on a per port basis; the transmit and receive data circuits
can be independentantly configured to be clocked from either a locally generated clock
or from the received clock circuit.
• Connector type
Provided on the SS7HDCR8S Rear Transition Module via two 37-way D-type connectors
(sockets), each providing access to four V.11 interfaces. Not available on the
SS7HDCR8TE or SS7HDCR16TE RTMs.
2.3.4 Rear Transition Modules
For a T1/E1/J1 interface, a Rear Transition Module (RTM) should be selected to provide
the physical connectivity required, with regard to the number of ports and connector
type:
• SS7HDCR8TEW provides for up to 8 T1/E1/J1 physical interfaces
• SS7HDCR16TEW provides for up to 16 T1/E1/J1 physical interfaces
The properties of the physical interfaces on the RTMs are described as follows:
• Connector type
— SS7HDCR8TEW contains eight individual RJ-45 connectors
— SS7HDCR16TEW contains two RJ-48M connectors, each providing 8
T1/E1/J1ports