HESI code: SAC1AAEAAA The SPQ-440 channel units are used to provide P-Phone applications in Universal SLC-2000 Access Systems. P-Phone refers to Northern Telecom's line of EBS telephone sets. The SPQ-429 are two-wire channel units that are paired to provide four lines of EBS service between a DMS-1000 switch and EBS phones when a SLC-2000 Access System is used. The SPQ-429, acting as the current feed, provides the interface to the phone. |
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