Could you clarify what you mean by remote PIM? The reason I ask is NEC does have a connection for a "Remote PIM" which is not your typical CCIS or CCISoIP type connection. The main site has to have a DAIA card and the remote has to have a DAIB card and the sites are connected via a T-1. This set up has limitations. As an example each remote location can only be one PIM and no more. If you filled that PIM and needed more ports you would have to go with CCIS or CCISoIP.
Here is a brief overview of the cards:
PN-DAIA-A DAIA
T1 Digital Trunk Interface (1.5 Mbps) Card for Remote PIM
• Accommodates 24-channel PCM digital lines
• Provides Firmware Processor and BUS interface
• Provides one to six cards at the Main Site (NOTE

• FP01-03, FP16-19 can be set.
(NOTE

Corresponds to the number at the Remote Site.
PN-DAIB DAIB
T1 Digital Trunk Interface (1.5 Mbps) Card for Remote PIM
• Accommodates 24-channel PCM digital lines
• Provides Firmware Processor interface
• One card is required per Remote PIM at the Remote Site.
PN-DAIC DAIC
T1 Digital Trunk Interface (1.5 Mbps) Channel Expansion Card
• Accommodates 24-channel PCM digital lines
• Provides one to twelve cards at the Main Site
• Provides up to two cards at the Remote Site