Confidential Page 4 10/27/98
The
FAQ
About the 2800
Q: What is the difference between PRI and T1/E1?
A: A PRI line is delivered to the customer over the same facilities as a T1 or E1. When you specify
PRI you are specify the signaling method used by the 2800 to communicate with the telephone
company switch.
Q: Can the T1/E1 ports be set to either T1, E1, or PRI?
A: Yes, all 2800 series RAS devices have the software (and hardware) to select between any of these
signaling and line types.
Q: Does the 2800 support DNIS and ANI?
A: Yes, Dialed-Number-Identification-String (DNIS) is the number the user called to get to the 2800.
Automatic-Number-Identification (ANI) is the phone number of the person calling the 2800. Also
known as caller-id.
Q: What are the pinouts of the RJ-48’s on the they back of the 2800?
A: Pins 1&2 are data from the telephone network. Pins 3&4 are data to the telephone network.
Q: Can I terminate BRI lines directly into the 2800?
A: No. The 2800 terminates a PRI. The 2800 can terminate B channel calls from a BRI lines as long
as they are delivered over the PRI.
Q: What types of compression does the 2800 support?
A: Van Jacobson TCP header compression, PPP address and protocol compression, V.42/V.42bis
error correction and compression.
Q: Does the 2800 support R2 CAS signaling?
A: Yes. The 2800 allows full control over the R2 settings including the inter-register signaling
parameters.
Q: What is MFR2?
A: In E1 environments, CAS is accomplished using MFR2 signaling. MFR2 is an international
signaling system which uses six tones to provide end-to-end signaling of address (phone numbers)
and call information. Time-slot 16 is used to convey signaling status such as answer, seizure and
acknowledge. As R2 implementations within international regions can vary, the 2800 is designed to
allow extensive user level configuration of R2 line and interregister signaling parameters. As an
added feature, specific country profiles are preset in the 2800 to provided quick configuration
on a country-by-country basis.
Q: My country uses a modified version of R2, how can I adjust the parameters?
A: Through the web pages there is a link for configuration of MFR2 parameters. You can select the
meaning of the A-B-C-D bits, the transition timeouts and the inter-register signaling parameters.
Q: Is CLID (ANI) supported over R2 lines?
A: Yes. We will display the digits signaled to us from the forward switch.
Q: Are there any special configuration parameters when configuring R2?
A: Yes. The definition of the A-B-C-D bits and the interregister parameters. These may vary
depending on country and region.
Q: What types of channelized T1 signaling can the 2800 support?
A: The 2800 supports Loop-Start, Ground-Start and E&M Wink start.
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