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A-2 Preliminary May 9, 2000 APX 8000/MAX TNT/DSLTNT Physical Interface Configuration Guide
What you need from your T1 service provider
What you need from your T1 service provider
Request the following information about your T1 interface from your WAN provider:
• Type of signaling (inband or ISDN D channel)
• Type of line encoding (B8ZS or AMI)
• Type of framing (ESF or D4)
• Each telephone number assigned to the line, on a channel-by-channel or
service-by-service basis
• Number of nailed-up channels, if any
• Number of unused channels, if any
• Types of call-by-call services (also called NSF identifiers) on the switched channels
• Type of line provisioning (B channel, H0 channel, H11 channel, or multirate)
• D-channel assignment
• NFAS ID number (if the T1 PRI line is provisioned for NFAS)
Also, keep in mind the following points:
• In general, ESF framing and B8ZS line encoding are both recommended for T1
applications. In addition, channel 24 must be the D channel, except for applications using
non-facility associated signaling (NFAS).
• Applications that require NFAS must be connected to an AT&T or Northern Telecom
switch provisioned with NFAS.
• The TAOS unit can receive multichannel calls using MP encapsulation only if all channels
of the call share a common telephone number (namely, a hunt group). You can request that
your service provider supply you with a hunt group.
What you need from your E1 service provider
Request the following information about your E1 interface from your WAN provider:
• The telephone numbers assigned to your E1 interface, channel by channel
• Nailed-up channels (also called private WAN), if any
• Unused channels, if any
• Switch type (or emulation)—DPNSS only
• Configuration for switch layers 2 and 3—DASS 2 and DPNSS only (A/B end, X/Y end)
• Rate adaption protocol—DASS 2 and DPNSS only (X.30)
Note: The TAOS unit can receive multichannel calls using MP encapsulation only if all
channels of the call share a common telephone number (namely, a hunt group). You can
request that your service provider supply you with a hunt group.