Specifications

Chapter 1 Introduction Installation and Operation Manual
1-4 Overview ASMi-52CQ Ver. 2.12
Timing
ASMi-52CQ supports three clock modes:
• Internal, derived from its internal oscillator
• External, supplied by the attached DTE
• System, supplied by the LRS-24 station clock input
• Receive, derived from the SHDSL line
Table 1-3 details the ASMi-52CQ data rates with all possible combinations of DTE
interface types and clock modes. Each port can have its own separate clocking.
If the DTE interface is E1 or T1 and receive clocking is chosen for one port, all
ports must use receive clocking.
Table 1-3. ASMi-52CQ Data Rates
DTE Interface Clock Mode Data Rate
V.35, RS-530, X.21, ETH Internal n × 64 kbps (n = 1, 2, …, 32, 36)
V.35, RS-530, X.21 External n × 64 kbps (n = 1, 2, …, 36)
V.35, RS-530, X.21, ETH Station n × 64 kbps (n = 1, 2, …, 32)
E1 Internal, external, station, receive n × 64 kbps (n = 1, 2, …, 32)
T1 Internal, external, station, receive n × 64 kbps (n = 1, 2, …, 24)
Remote Management
ASMi-52CQ allows full management of the local and remote modems using SNMP
management, Telnet or an ASCII terminal via the CM-2 card of the LRS-24 modem
rack. Management of the remote unit is achieved via an inband channel that
allows simultaneous remote configuration for both modems, real-time alerts on
failures, diagnostic tests, and statistical information on system performance. The
configuration parameters are stored in card flash memory.
The modem uses an Embedded Operation Channel (EOC) for controlling and
monitoring the remote unit in accordance with the SHDSL (G.991.2) standard.
The management channel operates without interfering with data transmission.
The operator can perform diagnostic tests from the remote ASMi-52 modem.
Diagnostics
ASMi-52CQ has comprehensive diagnostics capabilities that are activated from
either the ASCII terminal or from an SNMP management tool. They include the
following test options:
• V.54 local analog and remote digital loopbacks
• V.54 BER test
• SHDSL statistics collection.
All tests can be activated from the local unit or from the remote unit. SHDSL
statistics can be activated from the RADview SNMP management tool.
Note