6-2
MAX Administration Guide
Administering ISDN
Displaying E1 ISDN call information
Calls are not dialed or answered reliably
If calls are not dialed or answered reliably, proceed as follows:
1
Check your cabling.
The first and most critical aspect of the interface is the physical cable connecting the
MAX to the line or terminating equipment. Typically, WAN interface cabling problems
appear immediately after installation. If you are unsure about the cabling required, contact
Lucent Technologies Customer Service.
2
If the cabling is not the problem and the MAX is a T1 unit, check that the value of the
Buildout parameter or the Length parameter in the Line profile matches the actual distance
in your configuration.
The MAX displays the Buildout parameter if its interface to the T1 line is equipped with
an internal CSU. Its enumerated values can be 0 DB, 7.5 DB, 15 DB, and 22.5 DB.
Contact your carrier representative to determine which value to choose.
If the line interface is not equipped with an internal CSU, the Length parameter is
displayed. It can specify a cable length, of 1-133, 134-266, 267-399, 400-533, or 534-655
in feet, which should correspond to the distance between the MAX and the WAN interface
equipment, typically a CSU or multiplexer.
Note:
T1/PRI ports not equipped with internal CSUs require an external CSU or other
equipment approved for the metallic interface between the MAX and the WAN facility.
The Net/BRI lines do not dial or answer calls
Do not connect the MAX unit’s Net/BRI ports directly to U-interface BRI lines. The MAX
unit’s Net/BRI ports require carrier-approved Network Terminating 1 (NT1) equipment
between the MAX and BRI lines.
Note:
Net/BRI outbound calls require the use of trunk groups.
Displaying E1 ISDN call information
If the E1/PRI line switch-type is German 1TR6 or Japanese NTT, display information about
ISDN calls by invoking the terminal-server command line and entering the Show Calls
command. For example:
ascend% show calls
The command displays statistics about current calls. For example:
Call ID Called Party ID Calling Party ID InOctets OutOctets
3 5104563434
4191234567
0
0
4
4197654321
5108888888
888888
99999
The Call ID column contains an index number specific to the call.
Called Party ID and Calling Party ID show the telephone number of the answering device and
calling device, respectively.