Administration - Nortel Meridian 1 Succession 1000 Manual

Page 148 of 236

Administration

553-3001-182 Standard 1.00
Meridian Modular Telephones
The recommended North American SOLR value is 12 dB. Table 38 lists the
values accepted for LD 17 prompt SOLR.
Table 38
Acceptable SOLR values
SOLR
0
1
2
3
4
Note: The default value is 1 (12 dB). The recommended value is 1 (12
dB).
As the SOLR value increases, the receiver has less of the transmitted signal
coupled back to it. As the SOLR value decreases, the receiver has more of the
transmitted signal (near end person's voice, room noise) coupled back to it.
Factoring in the return loss of the trunk interface, the default SOLR value of
12 dB produces an effective SOLR of 9 dB with nominal return loss on
external calls.
Note that changing the SOLR value (transmission setting) affects only the
integral sidetone control circuits in the telephone. Other sources that
contribute sidetone (such as return loss at trunk interfaces at the switch, CO,
and through the entire network to the far end) are independent of the SOLR
transmission setting. This rules applies to all Meridian Modular Telephones
except the M2216ACD-1 and M2216ACD-2, which have their sidetone
values fixed at the North American default level of 12 dB, except the SOLR
download.
October 2003
North American
Loudness rating
7 dB
12 dB (default)
17 dB
22 dB
sidetone disabled
International
Loudness rating
9 dB (default)
15 dB
21 dB
27 dB
sidetone disabled