Lucent Technologies 7820-0802-003 manual Configuring E1 R1 signaling, Configuring E1 R2 signaling

Configuring E1 Cards

Configuring E1 R1 signaling

ISDN emulation enables you to build, send, receive, and process ISDN data. ISDN monitoring, on the other hand, allows you only to decode the ISDN data.

Configuring E1 R1 signaling

R1 is a multifrequency inband signaling protocol that uses a set of register signals known as MFR1 tones as addressing signals. Each address (telephone number) is preceded by a KP pulse and followed by an ST pulse denoting the end of addressing.

The R2 signaling option must be software licensed (hash-code enabled) on the system for R1 signaling to work. If one or more E1 lines on an E1 card are configured for R1 signaling, no other line on the card can use R2 signaling.

Following are the parameters relevant to R1 signaling, shown with sample values:

[in E1/{shelf-1 slot-13 1}:line-interface]

signaling-mode = r1-inband

switch-type = cas

All other line signaling parameters can be left in their default settings. The following example specifies R1 signaling on an E1 line in shelf 1, slot 13:

admin> read e1 {1 13 1}

E1/{ shelf-1 slot-13 1 } read

admin> set line signaling-mode = r1-inband

admin> set switch-type = cas

admin> write

E1/{ shelf-1 slot-13 1 } written

Configuring E1 R2 signaling

R2 signaling is an ITU-T standardized signaling protocol, which can be used on E1 digital trunks for switched circuits. It uses a combination of A/B bit manipulation in channel 16 of the E1 frame (line signaling), and inband MF tone generation and detection (register signaling). The relevant specifications are in ITU-T recommendations Q.400 to Q.490. R2 signaling is widely implemented in international markets where ISDN PRI is not yet available. The default bandwidth for data calls coming in over E1 channels using R2 signaling is 64Kbps.

To configure R2 signaling, you might need to set some or all of the following parameters:

Parameter	Specifies
Switch-Type	Type of switch the TAOS unit connects to. For R2 signaling, you must
	set Switch-Type to Switch-CAS. When the line is configured for
	channel associated signaling (CAS), the TAOS unit does not receive
	bearer-capability information from the carrier. Therefore, it cannot
	determine whether a call is voice-service or digital-service. For
	call-routing purposes, all calls on inband lines are assumed to be
	digital calls.
Answer-Delay	Milliseconds the TAOS unit delays before answering an R2 call.

9-10 APX 8000/MAX TNT/DSLTNT Physical Interface Configuration Guide