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Each ATA will have 2 lines associated to it correct?<br />
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So if I read correctly I will drop the first 2 hex digits and add 01 to the end for the 2nd line correct?
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Each ATA will have 2 lines associated to it correct?

So if I read correctly I will drop the first 2 hex digits and add 01 to the end for the 2nd line correct?

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Yes, you are correct. You can connect 2 faxes, for example
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Yes, you are correct. You can connect 2 faxes, for example

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I've just purchased 2 new cisco ATA 187's and was a little confused on how to begin the install.<br />
<br />
Do I set the ATA's up as phones under devices or as gateways in CUCM? These will be used specifically for faxing. &nbsp;I would also like to ask if this setup would work through a VPN tunnel?<br />
<br />
Any help is appreciated.
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I've just purchased 2 new cisco ATA 187's and was a little confused on how to begin the install.

Do I set the ATA's up as phones under devices or as gateways in CUCM? These will be used specifically for faxing.  I would also like to ask if this setup would work through a VPN tunnel?

Any help is appreciated.

Cisco ATA CUCM configuration for faxing

Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service. The term specifically refers to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).  Examples of the VoIP protocols are H.323, Media Gateway Control Protocol (MGCP), Session Initiation Protocol (SIP), H.248 (also known as Media Gateway Control (Megaco)), Real-time Transport Protocol (RTP), Real-time Transport Control Protocol (RTCP), Secure Real-time Transport Protocol (SRTP), Session Description Protocol (SDP), and Inter-Asterisk eXchange (IAX).

Voice Over IP

A virtual private network (VPN) is a network that uses a public telecommunication infrastructure, such as the Internet, to provide remote offices or travelling users access to a central organizational network securely. VPNs encapsulate data transfers using secure cryptographic methods and other security mechanisms to ensure that only authorized users can access the network and that the data cannot be intercepted.

Cisco PIX is a dedicated hardware firewall appliance; the Cisco Adaptive Security Appliance (ASA) is a firewall and anti-malware security appliance that provides unified threat management and protection the PIX does not. Other Cisco devices and systems include routers, switches, storage networking, wireless and the software and hardware for PIX Firewall Manager (PFM), PIX Device Manager (PDM) and Adaptive Security Device Manager (ASDM).