Specifications

Chapter 4 Managing ASMi-52 via a Terminal ASMi-52 Installation and Operation Manual
4-36 Configuring the Physical Ports
Configuring the T1 Interface
ASMi-52 units with T1 interface require configuration of the following parameters:
• Framing mode:
 Unframed – Stream of bits at 1.544 Mbps
 ESF – 24 frames per multiframe
 SF – 12 frames per multiframe
• Line coding:
 B8ZS – B8ZS coding
 AMI – AMI coding
• Receive gain (sensitivity of the receive equalizer):
 Long – -36 dB
 Short – 15 dB
• Interface:
 DSU – DSU interface
 CSU – CSU interface
• Transmit signal mask (DSU mode) – length of a cable in feet between the
ASMi-52 T1 port connector and the network access point:
 0 feet – 0 to 133 ft
 133 feet – 133 to 266 ft
 266 feet – 266 to 399 ft
 399 feet – 399 to 533 ft
 533 feet – 533 to 655 ft.
• Transmit signal mask (CSU mode) – relative T1 output transmit level:
 7.5 dB – attenuation of 7.5 dB relative to the nominal transmit level)
 15 dB – attenuation of 15 dB relative to the nominal transmit level)
 22.5 dB – attenuation of 22.5 dB relative to the nominal transmit level)
• Fbit configuration – F-bit transmission mode:
 Transparent – F bits are sampled at TSER
 Internally Source – F bits are sourced internally.
Configuration of the sync mode, idle code, timeslot assignment and matching of T1
setting of the local and remote units is identical of that of the E1 interface. Refer to
Configuring the E1 Interface section above.

To access the T1 Configuration menu:
1. From the Physical Ports Configuration menu, select T1 Configuration.
The T1 Configuration menu appears.
2. From the T1 Configuration menu, select T1 local port configuration for the
local port configuration or select T1 remote port configuration for the remote
port configuration.
Note