Cisco 627 — ATM-25 ADSL Modem

The Cisco 627 ATM-25 asymmetric digital subscriber line (ADSL) modem is designed for small and branch offices to provide cost-effective access to high-speed ADSL services. The leading Cisco architecture and compact design of the Cisco 627 makes it a low-cost, high-value DSL solution. The Cisco 627 preserves the customer`s investment in existing business class routers, allowing them to take advantage of new world applications and packet telephony.

Key Features and Benefits

The Cisco 627 ATM-25 Asymmetric Digital Subscriber Modem features:

Plug-and-play installation—the Cisco 627 is simple and easy to use-no modem configuration or service provider provisioning procedures are needed to install and operate the modem.
PPP over ATM support—because the Cisco 627 operates as an ATM bridge, transparent support for any protocol is available, including support for PPP over ATM for easy and secure navigation support and integration with the leading Cisco DSL services architecture.
Multiple DSL links—two DSL connections can be established using Multilink PPP enabled on business-class routers, such as the Cisco 3600. With the addition of a second ATM WAN interface and Cisco 627 modem, the theoretical throughput of the WAN connection can effectively be doubled.
Priority queues—the Cisco 627 supports high- and low-priority traffic queues for prioritizing voice and data traffic across the WAN link.
Management support—the Cisco 627 is managed through a command-line interface accessible through the management serial port or remotely through Layer 3 in-band management features. Up to four virtual circuits (VCs) can be configured in the Cisco 627.
Simultaneous voice—telephone support-an optional basic telephone service splitter is available to provide simultaneous high-speed data and voice telephone service support over a common user telephone line.
Lifeline basic telephone service—through design, a power outage or failure condition of the Cisco 627 will not interrupt voice telephone service, a capability known as lifeline basic telephone service.
Safety and compliance—the Cisco 627 is designed for worldwide safety and electromagnetic certifications (EMC).

Specifications

Hardware

**Table 9-36: Technical Specifications for Cisco 627**
Description	Specification
ADSL Interface	ADSL, DMT encoding: ANSI T1.413 Issue 2 (full-rate DMT over analog basic telephone service) G.992.1 Annex A (full-rate DMT over analog basic telephone service) G.992.2 Annex A (g.lite) RJ-11 connector, unshielded twisted pair copper wire
Protocols/Standards Supported ATM Support	Forum UNI 3.1, ITU-TI.432
User Interface	ATM Forum 25.6 (RJ45 connector)
Standard hardware components	ATM25 interface, DMT ADSL interface, imbedded processor, SAR and DRAM
Data Rate	DMT Full Rate (g.dmt) ADSL: Downstream Speed Range: 32 kbps to 8032 kbps Upstream Speed Range: 32 kbps to 864 kbps Increments: 32 kbps G.lite ADSL: Downstream Speed Range: 32 kbps to 1536 kbps Upstream Speed Range: 32 kbps to 512 kbps Increments: 32 kbps
Flash Memory	1 MB
DRAM	2 MB
Processor type	Intel I960
Software options	Full rate DMT, g.lite
Power Source	110-240 VAC

**Table 9-37: Other Information/Components Specifications for Cisco 627**
Model	LAN Interface	Fixed WAN Interface	WAN Interface Cards Supported
Cisco 627	ATM25	DMT ADSL	N/A

**Table 9-38: Power Requirements for Cisco 627**
Description	Specification
AC input voltage	5V AC
AC input current	1.2 Amps
Power Requirements	5 VAC @ 1.0 Amps

**Table 9-39: Physical and Environmental Specifications for Cisco 627**
Description	Specification
Operating temperature range	32 to 104°F (0 to 40°C)
Operating humidity	5 to 90% noncondensing
Dimensions (H x W x D)	5.0 x 6.2 x 1.75 in. (12.7 x 15.7 x 4.5 cm)
Weight (average shipping)	1.5 lb (0.68 kg)

Standards Compliance

ATM Forum UNI Version 3.1 PVC
IEEE 802.3 and 802.3u 10BaseT and 100BaseTX physical layer specification

Routing and Bridging Support

IETF RFC 2364 Point-to-Point Protocol (PPP)
IETF RFC 1483 encapsulation over AAL5
IP (RFC 791)
- UDP (RFC 792)
- ICMP (RFC 791)
- ARP (RFC 826)
- RIP version 1 and RIP version 2 updating of routing tables
Static routing
Port Address Translation (PAT)
Dynamic Host Configuration Protocol (DHCP) server and client (RFC 2131, RFC 2132)
DHCP Relay Agent (RFC 1542)
IEEE 802.1d transparent learning bridging Management
RADIUS security and accounting (RFC 2058, RFC 2059)
HTML browser interface
Command-line interface
Cisco Commander Graphical User Interface (GUI)
Telnet
TFTP
SNMP MIB support (MIB-II, PPP MIB, spanning tree MIB, enterprise MIB)
PAP
Multilevel password protection

Software

Software Options

G.lite
Full-rate DMT
Single-user
Multi-user

Ordering Information

Product and Part Numbers Table 9-40: Part Numbers for the Cisco 627

Part Description	Part Number
Cisco 627 ATM25 ADSL Modem	CISCO627
Cisco 627 Software Options
Cisco 627 Software version 2.1.1	SF-627-2.1.1
Cisco 627 G.LITE Software Version 2.2.0	SF-627l-2.2.0
Cisco 627 DMT Software Version 2.2.0	SF-627d-2.2.0
XDSL Power Supply Cable Options
Cisco xDSL Power Cord for North America	CAB-PS-XDSL-NA
Cisco xDSL Power Cord for UK	CAB-PS-XDSL-UK
Cisco xDSL Power Cord for Europe	CAB-PS-XDSL-EUR
Cisco xDSL Power Cord for Australia	CAB-PS-XDSL-AUS
CPE POTS Splitter and Microfilter Options
DSL CPE POTS Splitter - 8 kHz Tabletop, 600 Ohm	PS-8K-MET-600
DSL CPE POTS Splitter, NID - 8 kHz, 600 Ohm	PS-8K-NID-600
CPE Microfilter, Inline, Single	MF-INLINE-CPE
CPE Microfilter, Inline, Single	MF-INLINE-CPE-3PK
CPE Microfilter - Wall Mount	MF-WALL-675

Table of Contents

Cisco 627 — ATM-25 ADSL Modem