Nortel Networks NN43001-301 manual QMT11 switch settings, ISL dedicated mode using PRI/DTI trunk

Dedicated mode using dialup modem 187

Set the HSDM or ASIM must be in synchronous mode. A data rate of 9.6 Kbps is recommended because it provides internal error detection and correction. The following data rates are also supported: 1.2 Kbps, 2.4 Kbps,

3.6Kbps, 4.8 Kbps, 7.2 Kbps, 14.4 Kbps, 19.2 Kbps, 38.4 Kbps, and 56 Kbps for ASIM. The High Speed Data Module (HSDM) supports 64 Kbps.

Note 1: This configuration is the least reliable due to the lockup problems inherent in Smart Modems from power splices and noisy lines. To increase the reliability on this configuration, a constant power source can be used when powering the modems. Also ensure that the TIE lines meet data grade specifications.

Note 2: Nortel takes no responsibility for ISL D-channel outages due to modem lockup.

Figure 74

ISL dedicated mode: using PRI/DTI trunk

QMT11 switch settings

If using the QMT11 ASIM, set the DIP switches, located on top of the unit under the flip-up, as follows:

•Hotline, On; See Note 1.

•Forced DTR, On; See Note 2.

•FDX (full duplex), On

•SYNC, On

•INTernal CLK, On

Nortel Communication Server 1000

ISDN Primary Rate Interface Installation and Commissioning

NN43001-301 02.03 Standard

Release 5.5 7 December 2007

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